NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

357 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 27
ONVOY, LLC - NJ 20
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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2022-12-21 254-684 0XXX6XXX which blocks → ONVOY, LLC - TX 903C TURNERSVL TX
2022-12-21 346-614 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F HSTNSUBURB TX
2022-12-21 346-654 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C PINEHURST TX
2022-12-21 409-302 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 TXSCYMARQU TX
2022-12-21 640-241 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 ATLNTIC CY NJ
2022-12-21 845-925 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NEW CITY NY
2022-12-21 940-446 0XXX4XXX6XXX · 2 holders which blocks → ONVOY, LLC - TX 903C GRAFORD TX
2022-12-21 940-470 0XXX4XXX which blocks → ONVOY, LLC - TX 903C PSMKNGDMLK TX
2022-12-21 943-210 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWNAN GA
2022-12-20 252-570 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 MOREHEADCY NC
2022-12-20 346-613 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F HOUSTON TX
2022-12-20 430-334 0XXX1XXX3XXX4XXX8XXX9XXX · 5 holders which blocks → TWILIO INTERNATIONAL, INC. 506J CLARKSVL TX
2022-12-20 432-472 0XXX1XXX4XXX · 2 holders which blocks → ONVOY, LLC - TX 903C MENTONE TX
2022-12-20 437-432 not yet reported which blocks → Bell Mobility 6574 Toronto —
2022-12-20 478-340 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J FORSYTH GA
2022-12-20 701-558 0XXX1XXX5XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - ND 8054 NORTHWOOD ND
2022-12-20 725-292 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F LAS VEGAS NV
2022-12-20 854-442 0XXX1XXX2XXX4XXX · 3 holders which blocks → ONVOY, LLC - SC 548E CLIO SC
2022-12-20 940-409 0XXX4XXX5XXX · 2 holders which blocks → TWILIO INTERNATIONAL, INC. 506J ST JO TX
2022-12-20 980-468 0XXX1XXX6XXX8XXX · 3 holders which blocks → ONVOY, LLC - NC 638E ALTON NC
2022-12-19 234-990 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H NO CANTON OH
2022-12-19 425-845 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - WA 483E KIRKLAND WA
2022-12-19 474-485 not yet reported which blocks → Fibernetics Corporation 464D Prudhomme —
2022-12-19 474-486 not yet reported which blocks → Fibernetics Corporation 464D Radisson —
2022-12-19 474-487 not yet reported which blocks → Fibernetics Corporation 464D Rosthern —
2022-12-19 567-760 0XXX1XXX2XXX7XXX8XXX9XXX · 4 holders which blocks → COMMIO, LLC 939H FREMONT OH
2022-12-19 656-212 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E TAMPACEN FL
2022-12-19 672-679 not yet reported which blocks → Videotron Ltd. 383F Victoria —
2022-12-19 839-867 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H SUMTER SC
2022-12-19 854-235 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HILTONHEAD SC
2022-12-19 864-290 0–9 XXXall 10 · 6 holders which blocks → COMMIO, LLC 939H LYMAN SC
2022-12-19 943-209 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E ATLANTA SO GA
2022-12-16 445-259 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MORRISVL PA
2022-12-16 474-480 not yet reported which blocks → Fibernetics Corporation 464D Asquith —
2022-12-16 474-481 not yet reported which blocks → Fibernetics Corporation 464D Cudworth —
2022-12-16 474-482 not yet reported which blocks → Fibernetics Corporation 464D Delisle —
2022-12-16 474-483 not yet reported which blocks → Fibernetics Corporation 464D Dundurn —
2022-12-16 474-484 not yet reported which blocks → Fibernetics Corporation 464D Hague —
2022-12-16 502-678 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - KY 987E LOUISVILLE KY
2022-12-16 539-309 0–9 XXXall 10 · 2 holders which blocks → COMMIO, LLC 939H SAPULPA OK
2022-12-16 572-232 0XXX1XXX5XXX9XXX · 3 holders which blocks → ONVOY, LLC - OK 409F WETUMKA OK
2022-12-16 657-647 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA
2022-12-16 667-422 0–9 XXXwhole prefix which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J BALTIMORE MD
2022-12-16 715-810 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → COMMIO, LLC 939H MARSHFIELD WI
2022-12-16 720-604 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F DENVER CO
2022-12-16 731-321 0XXX1XXX3XXX · 3 holders which blocks → ONVOY, LLC - TN 525E SCOTTSHILL TN
2022-12-16 925-504 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PSBG WEST CA
2022-12-16 943-207 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E ATLANTA NW GA
2022-12-15 326-867 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H TROTWOOD OH
2022-12-15 431-369 not yet reported which blocks → Fibernetics Corporation 464D Swan Lake —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.