NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

349 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2022-08-04 639-451 not yet reported which blocks → Fibernetics Corporation 464D Wakaw —
2022-08-04 639-452 not yet reported which blocks → Fibernetics Corporation 464D Waldheim —
2022-08-04 639-453 not yet reported which blocks → Fibernetics Corporation 464D Borden —
2022-08-04 639-454 not yet reported which blocks → Fibernetics Corporation 464D Bruno —
2022-08-04 640-230 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PRINCETON NJ
2022-08-04 754-291 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DEERFLDBCH FL
2022-08-04 839-218 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J COLUMBIA SC
2022-08-04 870-903 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 FULTON AR
2022-08-03 240-941 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN2 MD
2022-08-03 463-277 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F GREENWOOD IN
2022-08-03 636-241 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 WASHINGTON MO
2022-08-03 667-409 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MD 071F PARKVILLE MD
2022-08-03 901-673 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J COLLIERVL TN
2022-08-03 934-232 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ATLANTIC NY
2022-08-02 234-354 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MILLERSBG OH
2022-08-02 309-914 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLYMOUTH IL
2022-08-02 380-250 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 DUBLIN OH
2022-08-02 380-251 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 COLUMBUS OH
2022-08-02 437-438 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2022-08-02 509-920 0XXX6XXX9XXX · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J CHEWELAH WA
2022-08-02 516-930 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NASSAUZN01 NY
2022-08-02 567-756 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H MANSFIELD OH
2022-08-02 605-506 9XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J WORTHING SD
2022-08-02 672-673 not yet reported which blocks → Videotron Ltd. 787G Vancouver —
2022-08-02 813-761 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C TAMPACEN FL
2022-08-02 813-921 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C TAMPANTH FL
2022-08-02 825-865 not yet reported which blocks → Videotron Ltd. 787G Edmonton —
2022-08-02 945-251 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2022-08-02 956-769 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX which blocks → STPCS JOINT VENTURE, LLC 4290 RAYMONDVL TX
2022-08-01 551-354 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J HACKENSACK NJ
2022-08-01 640-229 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J CRANBURY NJ
2022-08-01 732-426 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F SOUTHRIVER NJ
2022-08-01 949-818 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C IRVINE CA
2022-07-29 386-351 0XXX1XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J JENNINGS FL
2022-07-29 641-290 2XXX9XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J MILO IA
2022-07-29 669-323 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SUNNYVALE CA
2022-07-29 770-430 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ATLANTA SO GA
2022-07-29 873-713 not yet reported which blocks → Iristel Inc. 154E Grenville —
2022-07-29 956-439 0–9 XXXwhole prefix which blocks → STPCS JOINT VENTURE, LLC 4290 LAREDO TX
2022-07-28 206-647 0–9 XXXwhole prefix which blocks → ONVOY, LLC - WA 483E RICHMNDBCH WA
2022-07-28 224-471 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DESPLAINES IL
2022-07-28 262-270 0–9 XXXall 10 · 3 holders which blocks → UNITED STATES CELLULAR - WI 6274 RACINE WI
2022-07-28 262-301 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 RACINE WI
2022-07-28 313-639 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2022-07-28 314-980 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 LADUE MO
2022-07-28 365-913 not yet reported which blocks → Bell Mobility 6574 Hamilton —
2022-07-28 385-471 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 KAYSVILLE UT
2022-07-28 385-475 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - UT 871E KAYSVILLE UT
2022-07-28 437-418 not yet reported which blocks → Bell Mobility 6574 Toronto —
2022-07-28 437-419 not yet reported which blocks → Bell Mobility 6574 Toronto —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.