NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 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 21
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
2013-07-05 873-404 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
2013-07-01 805-387 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SIMIVALLEY CA
2013-06-28 316-226 0–9 XXXall 10 · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J WICHITA KS
2013-06-28 415-638 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-06-28 512-962 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2013-06-28 512-987 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2013-06-28 513-486 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MASON OH
2013-06-28 631-296 0–9 XXXall 10 · 8 holders which blocks → CSC VOICE, LLC 612K BRIDGEMPTN NY
2013-06-28 702-826 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2013-06-28 714-340 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 YORBALINDA CA
2013-06-28 803-672 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 DENMARK SC
2013-06-28 872-236 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-06-28 872-238 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-06-28 901-364 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 MEMPHIS TN
2013-06-28 901-376 0–9 XXXwhole prefix which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN
2013-06-28 954-451 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E FTLAUDERDL FL
2013-06-28 956-422 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROMA TX
2013-06-27 202-751 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN1 DC
2013-06-27 289-454 not yet reported which blocks → Zayo Canada Inc. 8304 Cooksville —
2013-06-27 289-457 not yet reported which blocks → Zayo Canada Inc. 8304 Streetsville —
2013-06-27 317-672 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J INDIANAPLS IN
2013-06-27 343-291 not yet reported which blocks → Zayo Canada Inc. 8304 Ottawa-Hull —
2013-06-27 505-219 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2013-06-27 559-385 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FRESNO CA
2013-06-27 587-962 not yet reported which blocks → Zayo Canada Inc. 8304 Calgary —
2013-06-27 631-507 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 AMITYVILLE NY
2013-06-27 639-635 not yet reported which blocks → SaskTel 8091 Saskatoon —
2013-06-27 778-377 not yet reported which blocks → Zayo Canada Inc. 8304 Vancouver —

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.