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
2017-09-26 351-666 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MA 892D PEABODY MA
2017-09-26 405-857 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J NORMAN OK
2017-09-26 405-897 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J WHEATLAND OK
2017-09-26 431-556 not yet reported which blocks → TELUS Mobility 8303 Winnipeg —
2017-09-26 434-337 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F BIG ISLAND VA
2017-09-26 438-622 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Montreal —
2017-09-26 438-833 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Montreal —
2017-09-26 438-978 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Montreal —
2017-09-26 504-294 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 LAFITTE LA
2017-09-26 571-491 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 DULLES VA
2017-09-26 612-346 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 TWINCITIES MN
2017-09-26 646-819 0–9 XXXall 10 · 3 holders which blocks → TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2017-09-26 936-272 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F WILLIS TX
2017-09-26 980-402 0–9 XXXall 10 · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 CHARLOTTE NC
2017-09-26 980-499 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 KANNAPOLIS NC
2017-09-25 385-279 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 OGDEN UT
2017-09-25 434-365 0–9 XXXall 10 · 5 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - VA 4979 CHARLOTSVL VA
2017-09-25 438-248 not yet reported which blocks → IXICA Communications Inc. 812H Ste-Genevieve —
2017-09-25 438-428 not yet reported which blocks → IXICA Communications Inc. 812H Ile-Perrot —
2017-09-25 438-618 not yet reported which blocks → IXICA Communications Inc. 812H Pointe-Claire —
2017-09-25 438-648 not yet reported which blocks → IXICA Communications Inc. 812H Lachine —
2017-09-25 438-688 not yet reported which blocks → IXICA Communications Inc. 812H Montreal —
2017-09-25 438-748 not yet reported which blocks → IXICA Communications Inc. 812H Roxboro —
2017-09-25 475-259 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 DARIEN CT
2017-09-25 505-785 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D ALBUQURQUE NM
2017-09-25 515-400 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IA 221F DES MOINES IA
2017-09-25 539-217 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J SAND SPG OK
2017-09-25 540-426 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 STAFFORD VA
2017-09-25 726-999 0–9 XXXall 10 · 6 holders which blocks → USFON, INC. - TX 473F SANANTONIO TX
2017-09-22 213-319 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2017-09-22 229-808 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 DOERUN GA
2017-09-22 240-569 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MD 071F FLINTSTONE MD
2017-09-22 346-274 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2017-09-22 413-291 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H SPRINGFLD MA
2017-09-22 418-709 not yet reported which blocks → TELUS Mobility 8303 Riviere-du-Loup —
2017-09-22 431-557 not yet reported which blocks → TELUS Mobility 8303 Winnipeg —
2017-09-22 437-637 not yet reported which blocks → Iristel Inc. 154E Toronto —
2017-09-22 463-777 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D INDIANAPLS IN
2017-09-22 586-666 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C MT CLEMENS MI
2017-09-22 626-412 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E COVINA CA
2017-09-22 647-327 not yet reported which blocks → Bell Mobility 6574 Toronto —
2017-09-22 647-363 not yet reported which blocks → Iristel Inc. 154E Toronto —
2017-09-22 704-741 0–9 XXXwhole prefix which blocks → ONVOY, LLC - NC 638E CHARLOTTE NC
2017-09-22 706-785 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E HOGANSVL GA
2017-09-22 713-814 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2017-09-22 762-475 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E GIBSON GA
2017-09-22 778-536 not yet reported which blocks → Bell Mobility 6574 Abbotsford —
2017-09-22 778-692 not yet reported which blocks → TELUS Mobility 8301 Vernon —
2017-09-22 778-694 not yet reported which blocks → TELUS Mobility 8301 South Kamloops —
2017-09-22 778-951 not yet reported which blocks → Bell Mobility 6574 Vancouver —

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.