NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
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
2015-10-13 217-559 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E WESTVILLE IL
2015-10-13 430-302 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MABANK TX
2015-10-13 469-993 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F LEWISVILLE TX
2015-10-13 516-838 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
2015-10-13 579-636 not yet reported which blocks → Videotron Ltd. 8306 Joliette —
2015-10-13 579-920 not yet reported which blocks → Comwave Networks 160G Valleyfield —
2015-10-13 603-409 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LACONIA NH
2015-10-13 631-304 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2015-10-13 737-200 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C ELGIN TX
2015-10-13 737-400 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C AUSTIN TX
2015-10-13 775-505 0–9 XXXall 10 · 6 holders which blocks → SOUTHWEST TELEPHONE COMPANY - NV 218G PAHRUMP NV
2015-10-13 848-239 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 NEWBRNSWCK NJ
2015-10-13 862-296 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SUCCASUNNA NJ
2015-10-12 205-517 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 BIRMINGHAM AL
2015-10-12 267-889 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN2 PA
2015-10-12 319-260 not yet reported which blocks → IMON COMMUNICATIONS, LLC - IA 695G CEDARFALLS IA
2015-10-12 320-758 not yet reported which blocks → GARDONVILLE COOPERATIVE TELEPHONE ASSOCIATION - MN 625H ALEXANDRIA MN
2015-10-12 470-279 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2015-10-12 470-509 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NE GA
2015-10-12 570-917 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 SUNBURY PA
2015-10-12 725-200 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NV 029F LAS VEGAS NV
2015-10-12 725-300 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NV 029F LAS VEGAS NV
2015-10-12 813-916 0–9 XXXwhole prefix which blocks → FRONTIER FLORIDA LLC DBA FRONTIER COMM OF FLORIDA 0328 TAMPAEST FL
2015-10-09 205-509 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F VINCENT AL
2015-10-09 205-512 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K JASPER AL
2015-10-09 210-983 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2015-10-09 217-992 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E MOWEAQUA IL
2015-10-09 217-995 0XXX1XXX2XXX3XXX5XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 LOVINGTON IL
2015-10-09 217-996 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E OAKWOOD IL
2015-10-09 226-337 not yet reported which blocks → TELUS Mobility 8303 Guelph —
2015-10-09 226-966 not yet reported which blocks → Fido Solutions Inc. 5643 Brantford —
2015-10-09 226-998 not yet reported which blocks → Fido Solutions Inc. 5643 London —
2015-10-09 260-777 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - IN 097D HAMILTON IN
2015-10-09 336-865 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 WINSTN SAL NC
2015-10-09 343-988 not yet reported which blocks → Fido Solutions Inc. 5643 Ottawa-Hull —
2015-10-09 438-858 not yet reported which blocks → Distributel 083E Montreal —
2015-10-09 502-340 0–9 XXXall 10 · 4 holders which blocks → POWERTEL KENTUCKY LICENSES, INC. 365C LOUISVILLE KY
2015-10-09 515-686 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 AMES IA
2015-10-09 586-474 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2015-10-09 586-577 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2015-10-09 587-936 not yet reported which blocks → Fido Solutions Inc. 5643 Edmonton —
2015-10-09 803-992 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 ROCK HILL SC
2015-10-09 828-767 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 ASHEVILLE NC
2015-10-09 843-998 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 CHARLESTON SC
2015-10-09 984-227 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 DURHAM NC
2015-10-09 989-800 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C LUPTON MI
2015-10-08 216-727 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2015-10-08 234-602 0–9 XXXall 10 · 8 holders which blocks → T-MOBILE USA, INC. 6529 HUDSON OH
2015-10-08 307-447 2XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WY 9416 SARATOGA WY
2015-10-08 317-795 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CARMEL IN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.