NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
2012-09-30 440-406 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 ELYRIA OH
2012-09-28 224-228 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC 224C BARRINGTON IL
2012-09-28 309-201 0–9 XXXall 10 · 5 holders which blocks → UNITED STATES CELLULAR - IL 6265 PEKIN IL
2012-09-28 313-236 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DETROITZN5 MI
2012-09-28 313-495 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DETROITZN5 MI
2012-09-28 331-215 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 NAPERVILLE IL
2012-09-28 480-341 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2012-09-28 480-374 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2012-09-28 563-231 0–9 XXXall 10 · 5 holders which blocks → UNITED STATES CELLULAR - IA 6266 DUBUQUE IA
2012-09-28 587-293 not yet reported which blocks → TELUS 8084 Calgary —
2012-09-28 587-301 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Swan Hills —
2012-09-28 587-730 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 High Level —
2012-09-28 720-541 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2012-09-28 872-209 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2012-09-28 918-981 0–9 XXXall 10 · 7 holders which blocks → UNITED STATES CELLULAR - OK 6272 PRYOR OK
2012-09-28 971-301 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OR 750E SALEM OR
2012-09-28 971-302 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PORTLAND OR
2012-09-27 224-307 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EVANSTON IL
2012-09-27 507-400 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MN 980E FARIBAULT MN
2012-09-27 574-318 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F SOUTH BEND IN
2012-09-27 845-288 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E BEACON NY
2012-09-27 845-328 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E ESOPUS NY
2012-09-27 903-414 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F HOWE TX
2012-09-27 903-419 0–9 XXXall 10 · 8 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F POTTSBORO TX
2012-09-27 917-780 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN12 NY
2012-09-27 917-946 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN03 NY
2012-09-27 956-404 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F BROWNSVL TX
2012-09-27 956-407 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BROWNSVL TX
2012-09-26 231-227 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K HONOR MI
2012-09-26 231-295 7XXX which blocks → CHARTER IP ENABLED SERVICES, LLC 792K LAKE CITY MI
2012-09-26 231-359 0XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K MECOSTA MI
2012-09-26 231-626 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K LEVERING MI
2012-09-26 434-328 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J CHARLOTSVL VA
2012-09-26 540-596 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CASTLE TEL. CO. 3029 NEW CASTLE VA
2012-09-26 682-205 0–9 XXXall 10 · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K GRANBURY TX
2012-09-26 713-815 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 HOUSTON TX
2012-09-26 717-947 0–9 XXXall 10 · 7 holders which blocks → CTSI, INC. - PA 7513 LANCASTER PA
2012-09-26 765-300 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF INDIANA, LLC - IN 279F BUCK CREEK IN
2012-09-26 770-462 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E VILLA RICA GA
2012-09-26 906-240 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K KINROSS MI
2012-09-26 906-442 0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K RUDYARD MI
2012-09-26 956-252 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EDINBURG TX
2012-09-25 202-317 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC 6402 WSHNGTNZN1 DC
2012-09-25 267-538 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J PHLDLPHZN4 PA
2012-09-25 317-646 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2012-09-25 319-505 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WATERLOO IA
2012-09-25 412-525 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2012-09-25 431-226 not yet reported which blocks → MTS Inc. 991B Bissett —
2012-09-25 431-227 not yet reported which blocks → MTS Inc. 991B Easterville —
2012-09-25 431-228 not yet reported which blocks → MTS Inc. 991B Grand Beach —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.