NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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. 39
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
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
2022-06-08 826-201 1XXX2XXX7XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J STRASBURG VA
2022-06-07 223-291 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J GLEN ROCK PA
2022-06-07 425-475 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H HALLS LAKE WA
2022-06-07 564-224 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ABERDEEN WA
2022-06-07 657-598 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2022-06-07 657-601 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2022-06-07 657-603 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CYPRESS CA
2022-06-07 669-328 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNJS WEST CA
2022-06-07 828-709 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 HICKORY NC
2022-06-07 878-260 0XXX2XXX3XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J CURTISVL PA
2022-06-07 910-993 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 ROCKINGHAM NC
2022-06-07 912-649 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WAYCROSS GA
2022-06-07 980-391 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 STATESVL NC
2022-06-06 445-256 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D PHLDLPHZN2 PA
2022-06-06 582-214 0XXX1XXX2XXX6XXX7XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SUGARGROVE PA
2022-06-03 256-491 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ROGERSVL AL
2022-06-03 279-224 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2022-06-03 341-219 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD BKLY CA
2022-06-03 445-269 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - PA 547E PHLDLPHZN1 PA
2022-06-03 623-304 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2022-06-03 936-339 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F HUNTSVILLE TX
2022-06-03 948-209 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 NWPTNWSZN3 VA
2022-06-01 213-913 0–9 XXXall 10 · 4 holders which blocks → BARR TELL USA, LLC 026K LSAN DA 07 CA
2022-06-01 260-309 0XXX8XXX9XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GARRETT IN
2022-06-01 260-313 1XXX9XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 NOMANCHETR IN
2022-06-01 470-975 0–9 XXXall 10 · 2 holders which blocks → COMMIO, LLC 939H ATLANTA SO GA
2022-06-01 530-856 0XXX2XXX7XXX · 2 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CHICO CA
2022-06-01 772-269 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 VERO BEACH FL
2022-06-01 810-880 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H FLINT MI
2022-06-01 820-212 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VNTRA EAST CA
2022-06-01 872-323 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 CHICGOZN01 IL
2022-06-01 904-839 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 GREENCVSPG FL
2022-06-01 928-320 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PIMA AZ
2022-05-31 213-887 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H LSAN DA 10 CA
2022-05-31 820-386 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H SIMIVALLEY CA
2022-05-31 831-788 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H SALINAS CA
2022-05-31 956-808 8XXX which blocks → TERRA NOVA TELECOM INC. 145J HARLINGEN TX
2022-05-30 431-213 not yet reported which blocks → Bell West Inc. 2933 Brandon —
2022-05-30 431-575 not yet reported which blocks → Bell West Inc. 2933 Winnipeg —
2022-05-30 437-652 not yet reported which blocks → Bell Mobility 6574 Toronto —
2022-05-27 213-571 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2022-05-27 224-462 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALGONQUIN IL
2022-05-27 249-365 not yet reported which blocks → Fibernetics Corporation 464D Gogama —
2022-05-27 249-382 not yet reported which blocks → Fibernetics Corporation 464D Hawk Junction —
2022-05-27 249-384 not yet reported which blocks → Fibernetics Corporation 464D Killarney —
2022-05-27 249-386 not yet reported which blocks → Fibernetics Corporation 464D Little Current —
2022-05-27 249-401 not yet reported which blocks → Fibernetics Corporation 464D Massey —
2022-05-27 272-286 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEWMILFORD PA
2022-05-27 272-287 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PITTSTON PA
2022-05-27 279-218 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM NORTH CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.