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
2012-11-20 571-458 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2012-11-20 667-308 0–9 XXXall 10 · 8 holders which blocks → PEERLESS NETWORK OF MARYLAND, LLC 568G TOWSON MD
2012-11-20 667-401 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BALTIMORE MD
2012-11-20 682-215 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2012-11-20 702-901 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NV 029F LAS VEGAS NV
2012-11-20 765-999 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF INDIANA, LLC - IN 279F CHESTERFLD IN
2012-11-20 808-462 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 TELECOM OF HAWAII, LP - HI 8297 HONOLULU HI
2012-11-20 848-300 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 7142 ATLATCHLDS NJ
2012-11-20 860-800 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NORWICH CT
2012-11-20 860-999 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F HARTFORD CT
2012-11-20 872-253 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC 224C CHICGOZN08 IL
2012-11-20 970-644 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF COLORADO, LLC - CO 278F GRAND JCT CO
2012-11-20 971-444 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OR 750E WOODBURN OR
2012-11-20 971-777 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OR 750E BEAVERTON OR
2012-11-20 971-888 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E PORTLAND OR
2012-11-20 971-999 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E YAMHILL OR
2012-11-19 226-766 not yet reported which blocks → Fibernetics Corporation 464D Stratford —
2012-11-19 226-767 not yet reported which blocks → Fibernetics Corporation 464D Listowel —
2012-11-19 307-800 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - WY 450F KEMMERER WY
2012-11-19 343-885 not yet reported which blocks → Fibernetics Corporation 464D Cornwall —
2012-11-19 343-886 not yet reported which blocks → Fibernetics Corporation 464D Vankleek Hill —
2012-11-19 404-334 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 551G ATLANTA GA
2012-11-19 407-530 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK OF FLORIDA, INC. (UNITED) 0341 KISSIMMEE FL
2012-11-19 480-666 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2012-11-19 551-888 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F UNION CITY NJ
2012-11-19 571-395 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J WSNGTNZN17 VA
2012-11-19 605-888 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - SD 162G CHAMBERLAN SD
2012-11-19 614-904 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 GAHANNA OH
2012-11-19 623-666 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2012-11-19 701-800 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - ND 452F LEONARD ND
2012-11-19 701-888 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - ND 452F MANVEL ND
2012-11-19 708-520 0–9 XXXwhole prefix which blocks → ILLINOIS BELL TEL CO 9329 OAK LAWN IL
2012-11-19 786-602 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 551G MIAMI FL
2012-11-19 856-408 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → NUSO, LLC 551G CAMDEN NJ
2012-11-19 872-465 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C CHICGOZN07 IL
2012-11-19 872-829 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC 224C CHICGOZN04 IL
2012-11-19 978-999 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F ROCKPORT MA
2012-11-19 980-888 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC 350F GASTONIA NC
2012-11-16 210-636 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
2012-11-16 234-231 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2012-11-16 406-313 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MT 453F BOULDER MT
2012-11-16 406-744 2XXX4XXX · 2 holders which blocks → WESTERN MONTANA COMMUNITYTEL INC. - MT 986F STIGNATIUS MT
2012-11-16 414-522 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MILWAUKZN1 WI
2012-11-16 435-315 0–9 XXXall 10 · 7 holders which blocks → COMCAST IP PHONE, LLC 318J HEBER CITY UT
2012-11-16 505-398 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NM 5470 LAS VEGAS NM
2012-11-16 512-952 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2012-11-16 520-474 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 TUCSON AZ
2012-11-16 571-302 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2012-11-16 571-550 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2012-11-16 715-721 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 COLBY WI

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.