NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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
Rogers Communications Canada Inc. (Wireless) 23
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
2019-01-23 279-800 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H ELK GROVE CA
2019-01-23 279-900 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H RSVL MAIN CA
2019-01-23 346-379 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CYPRESS TX
2019-01-23 435-264 0–9 XXXwhole prefix which blocks → ONVOY, LLC - UT 871E NAT BRIDGE UT
2019-01-23 435-269 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 2 holders which blocks → ONVOY, LLC - UT 871E BLUFF UT
2019-01-23 435-280 0XXX2XXX4XXX8XXX · 2 holders which blocks → ONVOY, LLC - UT 871E MEXICANHAT UT
2019-01-23 435-284 3XXX4XXX6XXX8XXX · 2 holders which blocks → ONVOY, LLC - UT 871E KANOSH UT
2019-01-23 435-325 2XXX3XXX4XXX5XXX8XXX which blocks → ONVOY, LLC - UT 871E MEADOW UT
2019-01-23 435-337 2XXX3XXX4XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - UT 871E LAKEPOWELL UT
2019-01-23 435-344 0XXX2XXX3XXX4XXX5XXX · 2 holders which blocks → ONVOY, LLC - UT 871E LA SAL UT
2019-01-23 435-345 4XXX5XXX6XXX which blocks → ONVOY, LLC - UT 871E THOMPSON UT
2019-01-23 435-432 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → ONVOY, LLC - UT 871E PROMONTORY UT
2019-01-23 435-441 1XXX2XXX3XXX4XXX5XXX which blocks → ONVOY, LLC - UT 871E HOLDEN UT
2019-01-23 435-495 2XXX4XXX5XXX which blocks → ONVOY, LLC - UT 871E OAK CITY UT
2019-01-23 469-597 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2019-01-23 505-370 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NM 206F LAS VEGAS NM
2019-01-23 517-428 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FOWLERVL MI
2019-01-23 726-222 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H SANANTONIO TX
2019-01-23 820-222 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H CAMARILLO CA
2019-01-23 820-333 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H THOUSAOAKS CA
2019-01-22 207-800 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H PORTLAND ME
2019-01-22 207-900 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H OLDORCHBCH ME
2019-01-22 228-333 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H BILOXI MS
2019-01-22 228-666 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H MOSS POINT MS
2019-01-22 228-800 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H OCEAN SPG MS
2019-01-22 254-346 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELTON TX
2019-01-22 279-666 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SCRM NORTH CA
2019-01-22 316-800 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H HALSTEAD KS
2019-01-22 316-816 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H GODDARD KS
2019-01-22 323-760 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 14 CA
2019-01-22 367-999 not yet reported which blocks → TELUS Mobility 8303 Quebec —
2019-01-22 412-707 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 PTTSBGZON2 PA
2019-01-22 438-455 not yet reported which blocks → Bell Mobility 6574 Montreal —
2019-01-22 470-493 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2019-01-22 480-651 0–9 XXXall 10 · 4 holders which blocks → QWEST CORPORATION 9636 PHOENIX AZ
2019-01-22 501-900 0–9 XXXall 10 · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J LITTLEROCK AR
2019-01-22 505-390 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NM 206F AZTEC NM
2019-01-22 510-975 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD ALMD CA
2019-01-22 561-426 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2019-01-22 561-428 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2019-01-22 586-290 0XXX1XXX2XXX3XXX8XXX9XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 RICHMOND MI
2019-01-22 657-369 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-01-22 747-286 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D GLENDALE CA
2019-01-22 769-444 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H JACKSON MS
2019-01-22 820-777 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SANTAPAULA CA
2019-01-22 820-999 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H OXNARD CA
2019-01-22 856-799 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J CAMDEN NJ
2019-01-22 858-288 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2019-01-22 862-799 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J NEWARK NJ
2019-01-22 913-666 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H KANSASCITY KS

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.