Skip to main content
TeamingIndex

Contractor directory

Find teaming partners

Search federal, defense and aerospace contractors by verified CMMC level, blind SPRS bracket, facility clearance, ITAR, contract vehicle, NAICS and set-aside. No account needed.
Sign in to save this search

2,509 contractorsSearch time 74 msSearch engine: Typesense

Skip filters, go to results

Search results

81–100 of 2,509

Active filters

Clear all filters

  1. STELLAR INNOVATIONS & SOLUTIONS INC.

    MORAINE, OHMission sector: Cyber & C5ISR +4 more: AI & Deep Tech R&D, SETA & Engineering, Logistics & Base Ops, Medical & Readiness

    Unclaimed profile
    UEIF3H1A4S2W2J1CAGE6C9L3NAICS541512
    • Subcontracted for TEKSYNAP CORPORATION. Source: USAspending.gov sub-awards (FSRS) (prime-reported)
    • GSA MAS contract. Source: USAspending.gov contract records and GSA CALC+, as of Nov 13, 2026
    • No confirmed screening-list match. No confirmed match on the Consolidated Screening List (screened Nov 14, 2026). Source: ITA Consolidated Screening List

    Government data from USAspending.gov sub-awards (FSRS), prime-reported; USAspending.gov contract records and GSA CALC+ (as of Nov 13, 2026); ITA Consolidated Screening List (as of Nov 14, 2026)

    Contract vehicles:8(a) STARS III (Streamlined Technology Acquisition Resources for Services) · PrimeGSA Multiple Award Schedule (MAS) · PrimeNASA SEWP VI (Solutions for Enterprise-Wide Procurement) · Prime+2 more
    Socio-economic status (SAM.gov):Small businessSDBVOSBSDVOSB
    $143.1M obligated, last 36 months · Defense Logistics Agency, Department of the Air Force

  2. CHEROENHAKA NOTTOWAY ENTERPRISES, LLC

    dba CHEROENHAKA NOTTOWAY ENTERPRISES LLCCOURTLAND, VAMission sector: Cyber & C5ISR +5 more: Defense Mfg & Maritime, SETA & Engineering, Logistics & Base Ops, MILCON & Facilities, Medical & Readiness

    Unclaimed profile
    UEIHPHVSDPH1K93CAGE8BX80NAICS517111
    • Subcontracted for HII MISSION TECHNOLOGIES CORP. Source: USAspending.gov sub-awards (FSRS) (prime-reported)
    • No confirmed screening-list match. No confirmed match on the Consolidated Screening List (screened Nov 14, 2026). Source: ITA Consolidated Screening List

    Government data from USAspending.gov sub-awards (FSRS), prime-reported; ITA Consolidated Screening List (as of Nov 14, 2026)

    Socio-economic status (SAM.gov):Small businessSDB8(a)HUBZoneTribally owned
    $143.1M obligated, last 36 months · Department of the Navy, Public Buildings Service

  3. SECURITYHUNTER, INC.

    WINDSOR MILL, MDMission sector: Cyber & C5ISR +4 more: Aerospace & UAS, SETA & Engineering, Logistics & Base Ops, MILCON & Facilities

    Unclaimed profile
    UEICE4FVLS87M41CAGE1TZX8NAICS561621
    • GSA MAS contract. Source: USAspending.gov contract records and GSA CALC+, as of Nov 13, 2026
    • No confirmed screening-list match. No confirmed match on the Consolidated Screening List (screened Nov 14, 2026). Source: ITA Consolidated Screening List

    Government data from USAspending.gov contract records and GSA CALC+ (as of Nov 13, 2026); ITA Consolidated Screening List (as of Nov 14, 2026)

    Contract vehicles:GSA Multiple Award Schedule (MAS) · PrimeSeaPort-NxG (SeaPort Next Generation) · Prime
    Socio-economic status (SAM.gov):Small business
    $138.3M obligated, last 36 months · Social Security Administration, Defense Contract Management Agency

  4. SKY SOLUTIONS LLC

    dba SKY SOLUTIONSVIENNA, VAMission sector: Cyber & C5ISR +4 more: Space & SatCom, AI & Deep Tech R&D, SETA & Engineering, Medical & Readiness

    Unclaimed profile
    UEILLR9CKT1FUL1CAGE7YC29NAICS541519
    • Subcontracted for GENERAL DYNAMICS INFORMATION TECHNOLOGY, INC., ACCENTURE FEDERAL SERVICES LLC. Source: USAspending.gov sub-awards (FSRS) (prime-reported)
    • GSA MAS contract. Source: USAspending.gov contract records and GSA CALC+, as of Nov 13, 2026
    • No confirmed screening-list match. No confirmed match on the Consolidated Screening List (screened Nov 14, 2026). Source: ITA Consolidated Screening List

    Government data from USAspending.gov sub-awards (FSRS), prime-reported; USAspending.gov contract records and GSA CALC+ (as of Nov 13, 2026); ITA Consolidated Screening List (as of Nov 14, 2026)

    Contract vehicles:8(a) STARS III (Streamlined Technology Acquisition Resources for Services) · PrimeGSA Multiple Award Schedule (MAS) · PrimeNASA SEWP VI (Solutions for Enterprise-Wide Procurement) · Prime+2 more
    Socio-economic status (SAM.gov):Small businessSDB8(a)
    $137.6M obligated, last 36 months · Centers for Medicare and Medicaid Services, Internal Revenue Service

  5. COMPTECH COMPUTER TECHNOLOGIES, INC

    CENTERVILLE, OHMission sector: Cyber & C5ISR +4 more: Aerospace & UAS, AI & Deep Tech R&D, SETA & Engineering, Logistics & Base Ops

    Unclaimed profile
    UEID5CCM1PF7WW5CAGE3HF12NAICS541519
    • Subcontracted for GENERAL DYNAMICS INFORMATION TECHNOLOGY, INC.. Source: USAspending.gov sub-awards (FSRS) (prime-reported)
    • GSA MAS contract. Source: USAspending.gov contract records and GSA CALC+, as of Nov 13, 2026
    • No confirmed screening-list match. No confirmed match on the Consolidated Screening List (screened Nov 14, 2026). Source: ITA Consolidated Screening List

    Government data from USAspending.gov sub-awards (FSRS), prime-reported; USAspending.gov contract records and GSA CALC+ (as of Nov 13, 2026); ITA Consolidated Screening List (as of Nov 14, 2026)

    Contract vehicles:GSA Multiple Award Schedule (MAS) · PrimeMDA SHIELD (Scalable Homeland Innovative Enterprise Layered Defense) · PrimeSeaPort-NxG (SeaPort Next Generation) · Prime
    Socio-economic status (SAM.gov):Small business
    $136.4M obligated, last 36 months · Defense Logistics Agency, Environmental Protection Agency

  6. ENVIRONET INC.

    KAPOLEI, HIMission sector: MILCON & Facilities +5 more: Cyber & C5ISR, Space & SatCom, AI & Deep Tech R&D, SETA & Engineering, Logistics & Base Ops

    Unclaimed profile
    UEIEEWLLJUH4SC9CAGE1NQM6NAICS236220
    • No confirmed screening-list match. No confirmed match on the Consolidated Screening List (screened Nov 14, 2026). Source: ITA Consolidated Screening List

    Government data from ITA Consolidated Screening List (as of Nov 14, 2026)

    Socio-economic status (SAM.gov):Small businessSDBHUBZoneVOSB
    $134.3M obligated, last 36 months · Department of the Navy, Department of the Army

  7. INALAB CONSULTING, INC.

    dba INALAB GROUPVIENNA, VAMission sector: Cyber & C5ISR +6 more: Space & SatCom, AI & Deep Tech R&D, SETA & Engineering, Logistics & Base Ops, MILCON & Facilities, Medical & Readiness

    Unclaimed profile
    UEIKW7MEJXRX4H8CAGE4B5M3NAICS541512
    • Subcontracted for CONSOLIDATED NUCLEAR SECURITY LLC. Source: USAspending.gov sub-awards (FSRS) (prime-reported)
    • GSA MAS contract. Source: USAspending.gov contract records and GSA CALC+, as of Nov 13, 2026
    • No confirmed screening-list match. No confirmed match on the Consolidated Screening List (screened Nov 14, 2026). Source: ITA Consolidated Screening List

    Government data from USAspending.gov sub-awards (FSRS), prime-reported; USAspending.gov contract records and GSA CALC+ (as of Nov 13, 2026); ITA Consolidated Screening List (as of Nov 14, 2026)

    Contract vehicles:8(a) STARS III (Streamlined Technology Acquisition Resources for Services) · PrimeGSA Multiple Award Schedule (MAS) · PrimeMDA SHIELD (Scalable Homeland Innovative Enterprise Layered Defense) · Prime+3 more
    Socio-economic status (SAM.gov):Small businessSDB
    $131.7M obligated, last 36 months · Department of the Air Force, U.S. Geological Survey

  8. INFORMATION SYSTEMS SOLUTIONS, INC.

    dba INFORMATION SYSTEMS SOLUTIONS INCROCKVILLE, MDMission sector: Cyber & C5ISR +5 more: AI & Deep Tech R&D, SETA & Engineering, Logistics & Base Ops, MILCON & Facilities, Medical & Readiness

    Unclaimed profile
    UEIJ9XACTPN6U53CAGE1EFB9NAICS541512
    • Subcontracted for GENERAL DYNAMICS INFORMATION TECHNOLOGY, INC.. Source: USAspending.gov sub-awards (FSRS) (prime-reported)
    • GSA MAS contract. Source: USAspending.gov contract records and GSA CALC+, as of Nov 13, 2026
    • No confirmed screening-list match. No confirmed match on the Consolidated Screening List (screened Nov 14, 2026). Source: ITA Consolidated Screening List

    Government data from USAspending.gov sub-awards (FSRS), prime-reported; USAspending.gov contract records and GSA CALC+ (as of Nov 13, 2026); ITA Consolidated Screening List (as of Nov 14, 2026)

    Contract vehicles:GSA Multiple Award Schedule (MAS) · PrimeOASIS+ (One Acquisition Solution for Integrated Services Plus) · PrimeSeaPort-NxG (SeaPort Next Generation) · Prime
    Socio-economic status (SAM.gov):Small businessWOSBVOSBSDVOSB
    $131.6M obligated, last 36 months · Department of the Navy, Department of the Army

  9. RED ONE MEDICAL DEVICES LLC

    Savannah, GAMission sector: Medical & Readiness +6 more: Cyber & C5ISR, Space & SatCom, AI & Deep Tech R&D, Defense Mfg & Maritime, SETA & Engineering, Logistics & Base Ops

    Unclaimed profile
    UEIC2WBTZ9TQDG9CAGE71UG3NAICS339113
    • GSA MAS contract. Source: USAspending.gov contract records and GSA CALC+, as of Nov 13, 2026
    • No confirmed screening-list match. No confirmed match on the Consolidated Screening List (screened Nov 14, 2026). Source: ITA Consolidated Screening List

    Government data from USAspending.gov contract records and GSA CALC+ (as of Nov 13, 2026); ITA Consolidated Screening List (as of Nov 14, 2026)

    Contract vehicles:GSA Multiple Award Schedule (MAS) · PrimeNASA SEWP VI (Solutions for Enterprise-Wide Procurement) · Prime
    Socio-economic status (SAM.gov):Small business
    $131.1M obligated, last 36 months · Department of Veterans Affairs, Defense Logistics Agency

  10. FIRE CREEK COMPANY

    WINNEBAGO, NEMission sector: Cyber & C5ISR +6 more: Aerospace & UAS, Space & SatCom, AI & Deep Tech R&D, SETA & Engineering, Logistics & Base Ops, MILCON & Facilities

    Unclaimed profile
    UEIJ2LAUU8LNZA3CAGE8BLF6NAICS561320
    • No confirmed screening-list match. No confirmed match on the Consolidated Screening List (screened Nov 14, 2026). Source: ITA Consolidated Screening List

    Government data from ITA Consolidated Screening List (as of Nov 14, 2026)

    Contract vehicles:8(a) STARS III (Streamlined Technology Acquisition Resources for Services) · PrimeNASA SEWP VI (Solutions for Enterprise-Wide Procurement) · PrimeOASIS+ (One Acquisition Solution for Integrated Services Plus) · Prime
    Socio-economic status (SAM.gov):Small businessSDB8(a)Tribally owned
    $128M obligated, last 36 months · Department of State, U.S. Citizenship and Immigration Services

  11. THE BIONETICS CORP

    YORKTOWN, VAMission sector: AI & Deep Tech R&D +7 more: Cyber & C5ISR, Aerospace & UAS, Space & SatCom, Defense Mfg & Maritime, SETA & Engineering, Logistics & Base Ops, Medical & Readiness

    Unclaimed profile
    UEILNKFGDHU6QZ4CAGE2H984NAICS541715
    • No confirmed screening-list match. No confirmed match on the Consolidated Screening List (screened Nov 14, 2026). Source: ITA Consolidated Screening List

    Government data from ITA Consolidated Screening List (as of Nov 14, 2026)

    Socio-economic status (SAM.gov):Small business
    $125.2M obligated, last 36 months · Department of the Air Force, Food and Drug Administration

  12. TELAFORCE LLC

    DESTIN, FLMission sector: Cyber & C5ISR +6 more: Aerospace & UAS, AI & Deep Tech R&D, Defense Mfg & Maritime, SETA & Engineering, Logistics & Base Ops, Medical & Readiness

    Unclaimed profile
    UEILJX2YHDNMDA1CAGE7RLU8NAICS541512
    • Subcontracted for GENERAL DYNAMICS INFORMATION TECHNOLOGY, INC., TRIAD NATIONAL SECURITY, LLC +1 more. Source: USAspending.gov sub-awards (FSRS) (prime-reported)
    • GSA MAS contract. Source: USAspending.gov contract records and GSA CALC+, as of Nov 13, 2026
    • No confirmed screening-list match. No confirmed match on the Consolidated Screening List (screened Nov 14, 2026). Source: ITA Consolidated Screening List

    Government data from USAspending.gov sub-awards (FSRS), prime-reported; USAspending.gov contract records and GSA CALC+ (as of Nov 13, 2026); ITA Consolidated Screening List (as of Nov 14, 2026)

    Contract vehicles:GSA Multiple Award Schedule (MAS) · PrimeMDA SHIELD (Scalable Homeland Innovative Enterprise Layered Defense) · PrimeOASIS+ (One Acquisition Solution for Integrated Services Plus) · Prime
    Socio-economic status (SAM.gov):Small business
    $123.7M obligated, last 36 months · Office of the Assistant Secretary for Administration and Management, Missile Defense Agency

  13. RSC2, INC

    BALTIMORE, MDMission sector: SETA & Engineering +7 more: Cyber & C5ISR, Aerospace & UAS, Space & SatCom, AI & Deep Tech R&D, Defense Mfg & Maritime, Logistics & Base Ops, Medical & Readiness

    Unclaimed profile
    UEICE85XBTV6923CAGE5R0H7NAICS541330
    • Subcontracted for ARCTIC SLOPE MISSION SERVICES, LLC, ARCTIC SLOPE MISSION SERVICES LLC. Source: USAspending.gov sub-awards (FSRS) (prime-reported)
    • GSA MAS contract. Source: USAspending.gov contract records and GSA CALC+, as of Nov 13, 2026
    • No confirmed screening-list match. No confirmed match on the Consolidated Screening List (screened Nov 14, 2026). Source: ITA Consolidated Screening List

    Government data from USAspending.gov sub-awards (FSRS), prime-reported; USAspending.gov contract records and GSA CALC+ (as of Nov 13, 2026); ITA Consolidated Screening List (as of Nov 14, 2026)

    Contract vehicles:GSA Multiple Award Schedule (MAS) · PrimeMDA SHIELD (Scalable Homeland Innovative Enterprise Layered Defense) · PrimeOASIS+ (One Acquisition Solution for Integrated Services Plus) · Prime+2 more
    Socio-economic status (SAM.gov):Small businessHUBZone
    $123M obligated, last 36 months · Department of the Army, Department of the Air Force

  14. TRANSOURCE SERVICES CORP.

    dba TRANSOURCE SERVICES CORPPHOENIX, AZMission sector: Cyber & C5ISR

    Unclaimed profile
    UEILG7SDLNKUQ27CAGE0MM09NAICS334111
    • Subcontracted for LEIDOS, INC., INNOVATIVE MANAGEMENT CONCEPTS, INC. +4 more. Source: USAspending.gov sub-awards (FSRS) (prime-reported)
    • GSA MAS contract. Source: USAspending.gov contract records and GSA CALC+, as of Nov 13, 2026
    • No confirmed screening-list match. No confirmed match on the Consolidated Screening List (screened Nov 14, 2026). Source: ITA Consolidated Screening List

    Government data from USAspending.gov sub-awards (FSRS), prime-reported; USAspending.gov contract records and GSA CALC+ (as of Nov 13, 2026); ITA Consolidated Screening List (as of Nov 14, 2026)

    Contract vehicles:GSA Multiple Award Schedule (MAS) · PrimeITES-4H (Information Technology Enterprise Solutions – 4 Hardware) · PrimeNASA SEWP V (Solutions for Enterprise-Wide Procurement) · Prime+1 more
    Socio-economic status (SAM.gov):Small businessWOSB
    $122.8M obligated, last 36 months · Department of the Air Force, Department of the Army

  15. SAALEX CORP

    dba SAALEX SOLUTIONS INCWASHINGTON, DCMission sector: SETA & Engineering +4 more: Cyber & C5ISR, AI & Deep Tech R&D, Logistics & Base Ops, Medical & Readiness

    Unclaimed profile
    UEIKU81PJLZY1N3CAGE1T4Z9NAICS541330
    • Subcontracted for NEW DIRECTIONS TECHNOLOGIES, INC.. Source: USAspending.gov sub-awards (FSRS) (prime-reported)
    • No confirmed screening-list match. No confirmed match on the Consolidated Screening List (screened Nov 14, 2026). Source: ITA Consolidated Screening List

    Government data from USAspending.gov sub-awards (FSRS), prime-reported; ITA Consolidated Screening List (as of Nov 14, 2026)

    Contract vehicles:MDA SHIELD (Scalable Homeland Innovative Enterprise Layered Defense) · PrimeOASIS+ (One Acquisition Solution for Integrated Services Plus) · PrimeSeaPort-NxG (SeaPort Next Generation) · Prime
    Socio-economic status (SAM.gov):Small businessVOSBSDVOSB
    $122.3M obligated, last 36 months · Department of the Navy, Missile Defense Agency

  16. ASRC FEDERAL ADVANCED RESEARCH, LLC

    BELTSVILLE, MDMission sector: AI & Deep Tech R&D +7 more: Cyber & C5ISR, Aerospace & UAS, Defense Mfg & Maritime, SETA & Engineering, Logistics & Base Ops, MILCON & Facilities, Medical & Readiness

    Unclaimed profile
    UEIHQ6BEJMMEYJ3CAGE8EWY6NAICS541715
    • No confirmed screening-list match. No confirmed match on the Consolidated Screening List (screened Nov 14, 2026). Source: ITA Consolidated Screening List

    Government data from ITA Consolidated Screening List (as of Nov 14, 2026)

    Contract vehicles:OASIS+ (One Acquisition Solution for Integrated Services Plus) · Prime
    Socio-economic status (SAM.gov):Small businessSDB8(a)ANC
    $121.7M obligated, last 36 months · Federal Aviation Administration, Department of the Army

  17. TRUESTONE, LLC

    HERNDON, VAMission sector: Cyber & C5ISR +7 more: Aerospace & UAS, AI & Deep Tech R&D, Defense Mfg & Maritime, SETA & Engineering, Logistics & Base Ops, MILCON & Facilities, Medical & Readiness

    Unclaimed profile
    UEIF8Q6Q81LJW84CAGE3NBM3NAICS517121
    • Subcontracted for SCIENTIFIC RESEARCH CORPORATION. Source: USAspending.gov sub-awards (FSRS) (prime-reported)
    • SBIR/STTR · 1 award. SBIR/STTR awardee: Phase III-eligible for work derived from its SBIR/STTR projects. Source: SBIR.gov, as of Nov 12, 2026
    • No confirmed screening-list match. No confirmed match on the Consolidated Screening List (screened Nov 14, 2026). Source: ITA Consolidated Screening List

    Government data from USAspending.gov sub-awards (FSRS), prime-reported; SBIR.gov (as of Nov 12, 2026); ITA Consolidated Screening List (as of Nov 14, 2026)

    Contract vehicles:RS3 (Responsive Strategic Sourcing for Services) · Prime
    Socio-economic status (SAM.gov):Small businessSDBANCTribally owned
    $120.9M obligated, last 36 months · Department of the Army, Defense Information Systems Agency

  18. JC TECHNOLOGY INC

    dba ACE COMPUTERSDES PLAINES, ILMission sector: Cyber & C5ISR +5 more: Aerospace & UAS, Space & SatCom, Defense Mfg & Maritime, SETA & Engineering, Medical & Readiness

    Unclaimed profile
    UEIKPFHGJDW5115CAGE1PWX7NAICS334111
    • Subcontracted for INNOVATIVE MANAGEMENT CONCEPTS, INC., SCIENCE APPLICATIONS INTERNATIONAL CORPORATION +1 more. Source: USAspending.gov sub-awards (FSRS) (prime-reported)
    • GSA MAS contract. Source: USAspending.gov contract records and GSA CALC+, as of Nov 13, 2026
    • No confirmed screening-list match. No confirmed match on the Consolidated Screening List (screened Nov 14, 2026). Source: ITA Consolidated Screening List

    Government data from USAspending.gov sub-awards (FSRS), prime-reported; USAspending.gov contract records and GSA CALC+ (as of Nov 13, 2026); ITA Consolidated Screening List (as of Nov 14, 2026)

    Contract vehicles:GSA Multiple Award Schedule (MAS) · PrimeITES-4H (Information Technology Enterprise Solutions – 4 Hardware) · PrimeMDA SHIELD (Scalable Homeland Innovative Enterprise Layered Defense) · Prime+2 more
    Socio-economic status (SAM.gov):Small business
    $120M obligated, last 36 months · Department of the Air Force, Department of the Army

  19. FEDITC, LLC

    ROCKVILLE, MDMission sector: Cyber & C5ISR +7 more: Aerospace & UAS, AI & Deep Tech R&D, Defense Mfg & Maritime, SETA & Engineering, Logistics & Base Ops, MILCON & Facilities, Medical & Readiness

    Unclaimed profile
    UEIC9HCJWLPZDQ3CAGE3H6B1NAICS517111
    • Subcontracted for ASIRTEK FEDERAL SERVICES, LLC, ICF INCORPORATED, L.L.C. +4 more. Source: USAspending.gov sub-awards (FSRS) (prime-reported)
    • GSA MAS contract. Source: USAspending.gov contract records and GSA CALC+, as of Nov 13, 2026
    • No confirmed screening-list match. No confirmed match on the Consolidated Screening List (screened Nov 14, 2026). Source: ITA Consolidated Screening List

    Government data from USAspending.gov sub-awards (FSRS), prime-reported; USAspending.gov contract records and GSA CALC+ (as of Nov 13, 2026); ITA Consolidated Screening List (as of Nov 14, 2026)

    Contract vehicles:GSA Multiple Award Schedule (MAS) · PrimeITES-3S (Information Technology Enterprise Solutions – 3 Services) · PrimeMDA SHIELD (Scalable Homeland Innovative Enterprise Layered Defense) · Prime+2 more
    Socio-economic status (SAM.gov):Small business
    $116.7M obligated, last 36 months · Department of the Army, Department of the Air Force

  20. ARROW ARC LLC

    ALEXANDRIA, VAMission sector: SETA & Engineering +5 more: Cyber & C5ISR, Space & SatCom, AI & Deep Tech R&D, Logistics & Base Ops, Medical & Readiness

    Unclaimed profile
    UEIK6BVRM8LQ4Q8CAGE9DC55NAICS541611
    • GSA MAS contract. Source: USAspending.gov contract records and GSA CALC+, as of Nov 13, 2026
    • No confirmed screening-list match. No confirmed match on the Consolidated Screening List (screened Nov 14, 2026). Source: ITA Consolidated Screening List

    Government data from USAspending.gov contract records and GSA CALC+ (as of Nov 13, 2026); ITA Consolidated Screening List (as of Nov 14, 2026)

    Contract vehicles:GSA Multiple Award Schedule (MAS) · PrimeNASA SEWP VI (Solutions for Enterprise-Wide Procurement) · PrimeOASIS+ (One Acquisition Solution for Integrated Services Plus) · Prime
    Socio-economic status (SAM.gov):Small businessVOSBSDVOSB
    $115.9M obligated, last 36 months · Department of Veterans Affairs, U.S. Customs and Border Protection

Directory facts come from SAM.gov and USAspending (synced nightly) and from profiles managed by the companies themselves. Every badge says who vouches for it: “verified” means TeamingIndex checked the credential; SPRS appears only as a blind bracket. How verification works