NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

357 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
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 27
ONVOY, LLC - NJ 20
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
2004-03-25 321-289 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TITUSVILLE FL
2004-03-25 325-204 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C ABILENE TX
2004-03-25 432-204 0–9 XXXall 10 · 4 holders which blocks → VEXUS 4913 ODESSA TX
2004-03-25 432-205 0–9 XXXall 10 · 3 holders which blocks → VEXUS 4913 MIDLAND TX
2004-03-25 432-206 none assigned yet which blocks → VEXUS 4913 TERMINAL TX
2004-03-25 509-481 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SPOKANE WA
2004-03-25 514-656 not yet reported which blocks → Videotron Ltd. 8306 Montreal —
2004-03-25 514-657 not yet reported which blocks → Videotron Ltd. 8306 Montreal —
2004-03-25 514-658 not yet reported which blocks → Videotron Ltd. 8306 Montreal —
2004-03-25 606-235 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 HUSTONVL KY
2004-03-25 606-342 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 SALT LICK KY
2004-03-25 724-524 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SAXONBURG PA
2004-03-25 731-881 not yet reported which blocks → CITIZENS COMM CO TN DBA FRONTIER COMM OF TN, LLC 4336 MARTIN TN
2004-03-25 814-273 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EDINBORO PA
2004-03-25 912-323 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SAVANNAH GA
2004-03-25 928-218 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MEADVIEW AZ
2004-03-25 989-231 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J CARO MI
2004-03-25 989-232 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J WHITTEMORE MI
2004-03-25 989-234 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J VICKERYVL MI
2004-03-25 989-237 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J SIXTYLAKES MI
2004-03-25 989-238 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J SANDLK HTS MI
2004-03-25 989-241 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J PORT HOPE MI
2004-03-25 989-242 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J PORTAUSTIN MI
2004-03-24 203-280 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 DARIEN CT
2004-03-24 231-205 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J BRUTUS MI
2004-03-24 231-207 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J HONOR MI
2004-03-24 231-208 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J BOYNEFALLS MI
2004-03-24 231-217 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J BEAR LAKE MI
2004-03-24 231-219 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J MERRITT MI
2004-03-24 231-226 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J GLEN LAKE MI
2004-03-24 231-230 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J ELMIRA MI
2004-03-24 231-232 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J MOORESTOWN MI
2004-03-24 231-235 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J LEVERING MI
2004-03-24 231-236 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J LAKE CITY MI
2004-03-24 231-240 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J LAKE ANN MI
2004-03-24 231-243 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J ALANSON MI
2004-03-24 289-833 not yet reported which blocks → Fido Solutions Inc. 5643 Richmond Hill —
2004-03-24 289-892 not yet reported which blocks → Fido Solutions Inc. 5643 Ajax-Pickering —
2004-03-24 514-504 not yet reported which blocks → Videotron Ltd. 8306 Montreal —
2004-03-24 814-439 2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CONNEAUTLK PA
2004-03-24 989-219 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J HOPE MI
2004-03-24 989-221 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J PINCONNING MI
2004-03-24 989-223 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J HALE MI
2004-03-24 989-226 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J GLENNIE MI
2004-03-24 989-228 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J CRYSTAL MI
2004-03-24 989-230 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J KINDE MI
2004-03-23 315-791 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 ONTARIO NY
2004-03-23 386-234 2XXX3XXX4XXX6XXX7XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WHITE SPG FL
2004-03-23 717-395 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 HARISBGZN1 PA
2004-03-23 919-300 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 SMITHFIELD NC

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.