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
2012-09-07 873-377 not yet reported which blocks → TELUS Mobility 8303 Drummondville —
2012-09-07 916-292 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2012-09-06 224-231 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 ROSELLE IL
2012-09-06 224-601 0–9 XXXall 10 · 8 holders which blocks → ILLINOIS BELL TEL CO 9329 SKOKIE IL
2012-09-06 401-430 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI 6389 PROVIDENCE RI
2012-09-06 401-602 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI 6389 PROVIDENCE RI
2012-09-06 405-693 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OKLA CITY OK
2012-09-06 469-401 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2012-09-06 512-910 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 AUSTIN TX
2012-09-06 581-989 not yet reported which blocks → TELUS Mobility 8303 Quebec —
2012-09-06 587-284 not yet reported which blocks → TELUS Mobility 8301 Calgary —
2012-09-06 587-982 not yet reported which blocks → TELUS Mobility 8301 Edmonton —
2012-09-06 603-307 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 NO CONWAY NH
2012-09-06 603-402 0–9 XXXall 10 · 4 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 NASHUA NH
2012-09-06 612-401 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TWINCITIES MN
2012-09-06 631-230 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E MONTAUK PT NY
2012-09-06 631-248 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E E HAMPTON NY
2012-09-06 631-359 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E WADING RIV NY
2012-09-06 631-429 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E LINDENHST NY
2012-09-06 631-535 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E PTJEFFERSN NY
2012-09-06 647-575 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2012-09-06 832-609 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2012-09-06 832-719 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 HSTNSUBURB TX
2012-09-06 832-801 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 HOUSTON TX
2012-09-05 210-419 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SANANTONIO TX
2012-09-05 224-301 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DESPLAINES IL
2012-09-05 484-216 0–9 XXXwhole prefix which blocks → PAETEC ITEL, LLC 829J PHPHSBZN28 PA
2012-09-05 570-999 3XXX6XXX9XXX · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J FORESTCITY PA
2012-09-05 581-882 not yet reported which blocks → TELUS Mobility 8303 Chicoutimi —
2012-09-05 832-530 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOUSTON TX
2012-09-05 850-330 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 CHIPLEY FL
2012-09-05 873-378 not yet reported which blocks → TELUS Mobility 8303 Shawinigan —
2012-09-04 214-983 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F GRANDPRARI TX
2012-09-04 320-854 not yet reported which blocks → HUTCHINSON TELECOMMUNICATIONS, INC. 4602 GLENCOE MN
2012-09-04 413-372 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J SPRINGFLD MA
2012-09-04 415-429 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2012-09-04 571-623 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2012-09-04 608-418 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 ALMA WI
2012-09-04 707-346 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NAPA CA
2012-09-04 716-293 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC- NY 384C CLARENCE NY
2012-09-04 720-387 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 TELECOM OF COLORADO, LLC - CO 4574 DENVER CO
2012-08-31 201-544 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW JERSEY, INC. 9206 JERSEYCITY NJ
2012-08-31 312-667 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN01 IL
2012-08-31 541-500 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K MEDFORD OR
2012-08-31 559-374 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FRESNO CA
2012-08-31 717-430 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 YORK PA
2012-08-31 719-247 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 COLORDOSPG CO
2012-08-31 732-538 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F ENGLISHTN NJ
2012-08-31 779-209 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E SANDWICH IL
2012-08-30 518-650 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J ALBANY NY

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.