NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2017-05-23 236-302 not yet reported which blocks → Iristel Inc. 154E Cranbrook —
2017-05-23 236-303 not yet reported which blocks → Iristel Inc. 154E Cranbrook —
2017-05-23 236-602 not yet reported which blocks → Iristel Inc. 154E Abbotsford —
2017-05-23 236-603 not yet reported which blocks → Iristel Inc. 154E Abbotsford —
2017-05-23 272-206 0–9 XXXall 10 · 4 holders which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 WATSONTOWN PA
2017-05-23 319-205 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MT VERNON IA
2017-05-23 319-281 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J HUDSON IA
2017-05-23 336-646 0–9 XXXall 10 · 4 holders which blocks → SOUTH CAROLINA NET, INC. - NC 511C GREENSBORO NC
2017-05-23 682-800 0–9 XXXall 10 · 3 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D ARLINGTON TX
2017-05-23 778-695 not yet reported which blocks → TELUS 8086 Newton —
2017-05-23 778-757 not yet reported which blocks → TELUS 8086 Abbotsford —
2017-05-23 828-560 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - NC 638E FAIRVIEW NC
2017-05-23 873-701 not yet reported which blocks → Iristel Inc. 154E Drummondville —
2017-05-23 878-210 0XXX9XXX · 2 holders which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 MIDWAY PA
2017-05-22 272-433 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MILLVILLE PA
2017-05-22 307-317 0–9 XXXwhole prefix which blocks → ONVOY, LLC - WY 450F CHEYENNE WY
2017-05-22 308-244 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 PALMER NE
2017-05-22 323-408 0–9 XXXall 10 · 2 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2017-05-22 406-412 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MT 453F BILLINGS MT
2017-05-22 434-999 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H CHARLOTSVL VA
2017-05-22 484-907 0XXX1XXX2XXX3XXX4XXX7XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 FERNDALE PA
2017-05-22 650-309 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HALFMOONBY CA
2017-05-22 857-443 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H BOSTON MA
2017-05-22 858-209 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DEL MAR CA
2017-05-22 909-401 0–9 XXXall 10 · 6 holders which blocks → METROPCS NETWORKS, LLC 899D FONTANA CA
2017-05-22 930-201 0–9 XXXwhole prefix which blocks → ONVOY, LLC - IN 097D CHARLESTN IN
2017-05-22 972-433 0–9 XXXall 10 · 6 holders which blocks → SOUTHWESTERN BELL 9533 PROSPER TX
2017-05-19 251-278 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FAIRHOPE AL
2017-05-19 434-867 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H LYNCHBURG VA
2017-05-19 518-991 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → CATSKILLS COMMUNICATIONS, INC - NY 360H HUNTER NY
2017-05-19 540-640 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H CULPEPER VA
2017-05-19 571-867 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H WSNGTNZN08 VA
2017-05-19 579-469 not yet reported which blocks → ISP Telecom Inc. 4727 Eastman —
2017-05-19 581-368 not yet reported which blocks → TELUS Quebec 8083 Saint-Alexis-de-Matapedia —
2017-05-19 581-369 not yet reported which blocks → TELUS Quebec 8083 Matapedia —
2017-05-19 657-361 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2017-05-19 757-900 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H NRFOLKZON1 VA
2017-05-19 848-994 0–9 XXXall 10 · 8 holders which blocks → CABLEVISION LIGHTPATH, INC. - NJ 4948 ASBURYPARK NJ
2017-05-19 862-326 0–9 XXXall 10 · 4 holders which blocks → BRIGHTSPEED OF NEW JERSEY, INC. 0138 FRANKLINBO NJ
2017-05-19 913-337 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY KS
2017-05-19 936-255 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 LUFKIN TX
2017-05-18 240-267 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 HAGERSTOWN MD
2017-05-18 409-204 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C HTCHCCKSNF TX
2017-05-18 609-739 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J BRIGANTINE NJ
2017-05-18 717-912 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F LOGANVILLE PA
2017-05-18 806-230 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - TX 903C HART TX
2017-05-18 907-651 2XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 NORTH POLE AK
2017-05-18 972-324 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FRISCO TX
2017-05-17 231-493 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TRAVERSECY MI
2017-05-17 272-422 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E DINGMAFRRY PA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.