NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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 26
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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2022-09-20 225-496 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 DONALDSNVL LA
2022-09-20 229-601 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J ALBANY GA
2022-09-20 251-412 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 MCINTOSH AL
2022-09-20 251-413 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 JACKSON AL
2022-09-20 251-416 0XXX1XXX2XXX6XXX8XXX9XXX · 4 holders which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 JACKSON AL
2022-09-20 346-590 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J WESTFIELD TX
2022-09-20 365-987 not yet reported which blocks → TELUS Mobility 8303 Brampton —
2022-09-20 368-995 not yet reported which blocks → TELUS Mobility 8301 Calgary —
2022-09-20 385-490 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
2022-09-20 438-861 not yet reported which blocks → TELUS Mobility 8303 Montreal —
2022-09-20 480-913 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2022-09-20 505-532 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2022-09-20 520-660 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2022-09-20 564-227 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 VANCOUVER WA
2022-09-20 564-264 2XXX3XXX4XXX7XXX8XXX which blocks → ONVOY, LLC - WA 483E CURTIS WA
2022-09-20 606-650 0–9 XXXall 10 · 3 holders which blocks → INTEGRATED PATH COMMUNICATIONS - KENTUCKY, LLC-KY 847H MIDDLESBO KY
2022-09-20 623-320 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2022-09-20 650-705 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 MT VIEW CA
2022-09-20 657-618 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SANTA ANA CA
2022-09-20 657-625 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CYPRESS CA
2022-09-20 657-631 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E FULLERTON CA
2022-09-20 720-964 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LONGMONT CO
2022-09-20 770-523 0–9 XXXall 10 · 2 holders which blocks → AT&T - LOCAL 7421 BUCHANAN GA
2022-09-20 826-210 0XXX which blocks → TERRA NOVA TELECOM INC. 145J NEWPORT VA
2022-09-20 826-220 0XXX which blocks → TERRA NOVA TELECOM INC. 145J PEMBROKE VA
2022-09-20 831-289 0XXX3XXX7XXX · 3 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L BEN LOMOND CA
2022-09-20 839-220 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 5 holders which blocks → NUSO, LLC 732J JACKSON SC
2022-09-20 949-731 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 NEWPORTBCH CA
2022-09-19 276-283 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G WYTHEVILLE VA
2022-09-19 312-910 0–9 XXXwhole prefix which blocks → ONVOY, LLC 224C CHICGOZN01 IL
2022-09-19 341-220 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 OKLD MN-PD CA
2022-09-19 826-209 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEWPORT VA
2022-09-19 971-437 0XXX4XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CANBYNEEDY OR
2022-09-16 213-684 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 09 CA
2022-09-16 225-495 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 BATONROUGE LA
2022-09-16 229-487 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 THOMASVL GA
2022-09-16 269-398 9XXX which blocks → AT&T - LOCAL 7421 THREE OAKS MI
2022-09-16 309-916 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J PEORIA IL
2022-09-16 319-508 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 KEOSAUQUA IA
2022-09-16 332-867 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H NWYRCYZN01 NY
2022-09-16 346-589 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F SPRING TX
2022-09-16 424-484 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C TORRANCE CA
2022-09-16 445-867 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → COMMIO, LLC 939H LANSDALE PA
2022-09-16 515-415 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H DES MOINES IA
2022-09-16 515-916 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 AMES IA
2022-09-16 516-956 0–9 XXXall 10 · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 NASSAUZN05 NY
2022-09-16 531-294 0XXX1XXX2XXX3XXX4XXX9XXX · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 NEBRASKACY NE
2022-09-16 557-888 0–9 XXXall 10 · 2 holders which blocks → TERRA NOVA TELECOM INC. 145J KIRKWOOD MO
2022-09-16 557-999 0–9 XXXall 10 · 6 holders which blocks → WIRETAP TELECOM, LLC. 733J SAPPINGTON MO
2022-09-16 672-200 not yet reported which blocks → Videotron Ltd. 787G Vancouver —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.