NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
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
2019-01-22 931-777 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H COLUMBIA TN
2019-01-22 979-274 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELLVILLE TX
2019-01-21 431-374 not yet reported which blocks → Bell Mobility 6574 Winnipeg —
2019-01-21 586-271 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 NEW HAVEN MI
2019-01-18 205-825 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J BIRMINGHAM AL
2019-01-18 210-783 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 SANANTONIO TX
2019-01-18 267-806 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN43 PA
2019-01-18 312-900 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CHICGOZN01 IL
2019-01-18 346-378 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 HSTNSUBURB TX
2019-01-18 417-407 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 BOLIVAR MO
2019-01-18 470-526 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA SO GA
2019-01-18 479-999 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J MENA AR
2019-01-18 480-549 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2019-01-18 513-567 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MIDDLETOWN OH
2019-01-18 540-952 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - VA 4644 BLACKSBURG VA
2019-01-18 646-994 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NWYRCYZN01 NY
2019-01-18 669-290 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SUNNYVALE CA
2019-01-18 669-309 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SNJS SOUTH CA
2019-01-18 804-806 0–9 XXXall 10 · 7 holders which blocks → HD CARRIER LLC 321J RICHMOND VA
2019-01-18 870-666 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H JONESBORO AR
2019-01-18 925-477 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ANTIOCH CA
2019-01-18 931-999 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H CLARKSVL TN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.