NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

337 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 25
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12
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
2013-07-10 832-954 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2013-07-10 913-401 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY KS
2013-07-09 216-303 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J CLEVELAND OH
2013-07-09 224-336 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
2013-07-09 224-413 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 WAUKEGAN IL
2013-07-09 224-415 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
2013-07-09 224-432 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 GLENVIEW IL
2013-07-09 331-218 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 WHEATON IL
2013-07-08 305-922 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 KEYS FL
2013-07-08 331-234 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 SUGARGROVE IL
2013-07-08 567-368 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OH 464C PERRYSBURG OH
2013-07-08 786-461 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 MIAMI FL
2013-07-05 269-883 0–9 XXXall 10 · 7 holders which blocks → MICHIGAN BELL TEL CO 9323 BATTLE CRK MI
2013-07-05 361-426 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 ROBSTOWN TX
2013-07-05 404-977 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2013-07-05 405-276 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OK 409F EL RENO OK
2013-07-05 405-369 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - OK 409F MINCO OK
2013-07-05 405-578 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → ONVOY, LLC - OK 409F YUKON OK
2013-07-05 405-731 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OK 409F MIDWEST CY OK
2013-07-05 579-248 not yet reported which blocks → TELUS Quebec 2243 Joliette —
2013-07-05 579-249 not yet reported which blocks → TELUS Quebec 2243 Sorel —
2013-07-05 579-250 not yet reported which blocks → TELUS Quebec 2243 Valleyfield —
2013-07-05 581-828 not yet reported which blocks → TELUS Quebec 2243 Alma —
2013-07-05 639-625 not yet reported which blocks → SaskTel 8091 Regina —
2013-07-05 646-774 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J NWYRCYZN01 NY
2013-07-05 845-366 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 HYDE PARK NY
2013-07-05 873-403 not yet reported which blocks → TELUS Quebec 2243 La Tuque —
2013-07-05 873-404 not yet reported which blocks → TELUS Quebec 2243 Magog —
2013-07-05 913-272 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY KS
2013-07-05 913-292 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY KS
2013-07-05 914-348 0–9 XXXall 10 · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E WSCHSTZN04 NY
2013-07-03 202-749 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 WSHNGTNZN1 DC
2013-07-03 225-210 0–9 XXXall 10 · 3 holders which blocks → VOICESTREAM GSM I, LLC 150C GONZALES LA
2013-07-03 470-207 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D CONYERS GA
2013-07-03 504-205 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 LAFITTE LA
2013-07-03 587-581 not yet reported which blocks → TELUS Mobility 8301 Calgary —
2013-07-03 587-582 not yet reported which blocks → TELUS Mobility 8301 Calgary —
2013-07-03 720-361 0–9 XXXall 10 · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 3467 DENVER CO
2013-07-03 807-633 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Thunder Bay —
2013-07-03 813-693 0–9 XXXall 10 · 4 holders which blocks → FRONTIER FLORIDA LLC DBA FRONTIER COMM OF FLORIDA 0328 TAMPANTH FL
2013-07-03 857-415 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D BOSTON MA
2013-07-03 864-393 1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → PRTCOMMUNICATIONS, LLC - SC 1701 CROSS HILL SC
2013-07-02 252-201 8XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 BAYBORO NC
2013-07-02 513-438 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MONROE OH
2013-07-02 559-391 0–9 XXXall 10 · 5 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J REEDLEY CA
2013-07-02 567-236 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ELMORE OH
2013-07-02 567-268 0–9 XXXall 10 · 8 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K TIFFIN OH
2013-07-01 202-748 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC 6402 WSHNGTNZN1 DC
2013-07-01 234-204 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K HOLMESVL OH
2013-07-01 786-420 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - FL 937C MIAMI FL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.