NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
2013-03-08 747-322 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFN SNFN CA
2013-03-08 760-313 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K EAGLE MT CA
2013-03-08 760-503 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F VTVL APVY CA
2013-03-08 902-397 not yet reported which blocks → Bell Mobility Aliant 329A Amherst —
2013-03-08 920-489 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 551G GREEN BAY WI
2013-03-07 205-224 0–9 XXXall 10 · 6 holders which blocks → PINE BELT BROADCASTING DBA PINE BELT TEL COMP SVCS 9736 BIRMINGHAM AL
2013-03-07 251-307 0–9 XXXall 10 · 4 holders which blocks → PINE BELT BROADCASTING DBA PINE BELT TEL COMP SVCS 9736 MOBILE AL
2013-03-07 260-240 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 551G FORT WAYNE IN
2013-03-07 276-598 0XXX1XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K RICHLANDS VA
2013-03-07 314-696 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF MISSOURI, LLC - MO 225F ST LOUIS MO
2013-03-07 334-630 0XXX1XXX2XXX7XXX8XXX9XXX · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K HUGULEY AL
2013-03-07 405-534 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OKLA CITY OK
2013-03-07 510-646 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E OKLD BKLY CA
2013-03-07 786-609 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2013-03-07 819-831 not yet reported which blocks → ISP Telecom Inc. 4727 Val-D'Or —
2013-03-07 857-317 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J BOSTON MA
2013-03-07 980-292 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E KINGS MT NC
2013-03-06 570-914 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NUSO, LLC 551G SCRANTON PA
2013-03-06 615-920 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 NASHVILLE TN
2013-03-06 681-284 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J BRAMWELL WV
2013-03-06 814-843 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 551G ALTOONA PA
2013-03-06 980-325 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ANSONVILLE NC
2013-03-06 980-698 6XXX8XXX9XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K HARMONY NC
2013-03-05 204-906 not yet reported which blocks → Bell Mobility 6574 Stonewall —
2013-03-05 226-376 not yet reported which blocks → Bell Mobility 6574 London —
2013-03-05 323-591 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LSAN DA 13 CA
2013-03-05 438-488 not yet reported which blocks → Fibernetics Corporation 464D Montreal —
2013-03-05 581-305 not yet reported which blocks → Bell Mobility 6574 Quebec —
2013-03-05 581-531 not yet reported which blocks → Comwave Networks 160G Quebec —
2013-03-05 587-338 not yet reported which blocks → Bell Mobility 6574 Edmonton —
2013-03-05 587-997 not yet reported which blocks → Fibernetics Corporation 464D Calgary —
2013-03-05 760-528 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E HOLTVILLE CA
2013-03-05 819-431 not yet reported which blocks → Bell Mobility 6574 Ottawa-Hull —
2013-03-05 867-223 not yet reported which blocks → Bell Mobility 6574 Iqaluit —
2013-03-05 909-371 0–9 XXXall 10 · 6 holders which blocks → METROPCS NETWORKS, LLC 899D FONTANA CA
2013-03-04 210-801 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SANANTONIO TX
2013-03-04 270-620 0XXX1XXX · 2 holders which blocks → NUSO, LLC 551G OWENSBORO KY
2013-03-04 308-318 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → NUSO, LLC 551G GRAND IS NE
2013-03-04 325-301 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → NUSO, LLC 551G SAN ANGELO TX
2013-03-04 409-203 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 551G BEAUMONT TX
2013-03-04 432-219 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 551G MIDLAND TX
2013-03-04 516-725 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN02 NY
2013-03-04 607-297 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 551G BINGHAMTON NY
2013-03-04 669-721 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SUNNYVALE CA
2013-03-04 701-955 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → NUSO, LLC 551G BISMARCK ND
2013-03-04 737-444 0–9 XXXall 10 · 5 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D GEORGETOWN TX
2013-03-04 737-666 0–9 XXXall 10 · 9 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D ELGIN TX
2013-03-04 737-888 0–9 XXXall 10 · 7 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D TAYLOR TX
2013-03-04 737-999 0–9 XXXall 10 · 6 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D BUDA TX
2013-03-04 806-502 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NUSO, LLC 551G AMARILLO TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.