Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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
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 ↓
Quick find in this area code:
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2017-05-25 343-528 not yet reported which blocks → TELUS Integrated Communications 2782 Orleans —
2017-05-25 346-261 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PORTER TX
2017-05-25 470-626 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2017-05-25 479-241 0XXX2XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 ST PAUL AR
2017-05-25 581-706 not yet reported which blocks → Iristel Inc. 154E Quebec —
2017-05-25 587-735 not yet reported which blocks → TELUS 8084 Edmonton —
2017-05-25 605-250 0–9 XXXwhole prefix which blocks → ONVOY, LLC - SD 162G SIOUX FLS SD
2017-05-25 609-940 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H TRENTON NJ
2017-05-25 669-544 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNJS NORTH CA
2017-05-25 720-586 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 DENVER CO
2017-05-25 907-313 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AK 9413 ANCHORAGE AK
2017-05-25 940-204 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C SANTO TX
2017-05-25 940-236 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - TX 903C ST JO TX
2017-05-24 226-908 not yet reported which blocks → Iristel Inc. 154E Owen Sound —
2017-05-24 236-801 not yet reported which blocks → Iristel Inc. 154E Duncan —
2017-05-24 430-230 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C AVERY TX
2017-05-24 431-304 not yet reported which blocks → Iristel Inc. 154E Portage La Prairie —
2017-05-24 479-210 0XXX1XXX2XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 DRAKES CRK AR
2017-05-24 506-306 not yet reported which blocks → Iristel Inc. 154E Edmundston —
2017-05-24 778-561 not yet reported which blocks → Iristel Inc. 154E Victoria —
2017-05-24 778-562 not yet reported which blocks → Iristel Inc. 154E Victoria —
2017-05-24 848-212 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 WOODBRIDGE NJ
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

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.