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
2015-01-06 912-822 1XXX2XXX4XXX · 3 holders which blocks → COMSOUTH TELENET, INC. - GA 9161 GLENNVILLE GA
2015-01-06 984-444 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NC 638E RALEIGH NC
2015-01-06 984-888 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NC 638E DURHAM NC
2015-01-06 984-999 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NC 638E CHAPELHILL NC
2015-01-05 216-413 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J CLEVELAND OH
2015-01-05 224-509 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ALGONQUIN IL
2015-01-05 225-503 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F DENHAM SPG LA
2015-01-05 469-971 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 FRISCO TX
2015-01-05 469-989 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 MCKINNEY TX
2015-01-05 512-817 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C LEANDER TX
2015-01-05 702-970 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J LAS VEGAS NV
2015-01-05 805-942 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PASOROBLES CA
2015-01-05 805-943 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PASOROBLES CA
2015-01-05 856-263 0–9 XXXall 10 · 3 holders which blocks → CABLEVISION LIGHTPATH, INC. - NJ 4948 CAMDEN NJ
2015-01-05 864-657 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J JONESVILLE SC
2015-01-02 269-775 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G KALAMAZOO MI
2015-01-02 520-965 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 TUCSON AZ
2015-01-02 734-685 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 ROMULUS MI
2015-01-02 859-479 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF KENTUCKY, LLC - KY 035H COVINGTON KY
2014-12-31 575-419 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 DULCE NM
2014-12-31 581-636 not yet reported which blocks → TELUS Quebec 8083 Riviere-au-Renard —
2014-12-31 581-637 not yet reported which blocks → TELUS Quebec 8083 Cloridorme —
2014-12-31 581-638 not yet reported which blocks → TELUS Quebec 8083 Grande-Vallee —
2014-12-31 581-639 not yet reported which blocks → TELUS Quebec 8083 Murdochville —
2014-12-30 334-600 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 HOLTVILLE AL
2014-12-30 424-393 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 INGLEWOOD CA
2014-12-30 513-857 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HAMILTON OH
2014-12-30 559-724 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 FRESNO CA
2014-12-29 205-872 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 TUSCALOOSA AL
2014-12-29 319-975 0–9 XXXall 10 · 6 holders which blocks → UNITED STATES CELLULAR - IA 6266 ANAMOSA IA
2014-12-29 331-310 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E BIG ROCK IL
2014-12-29 708-982 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 CICERO IL
2014-12-29 716-394 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BUFFALO NY
2014-12-29 734-292 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WAYNE MI
2014-12-29 754-218 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 FTLAUDERDL FL
2014-12-28 920-861 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 WINNECONNE WI
2014-12-26 856-249 0–9 XXXall 10 · 5 holders which blocks → INTRADO COMMUNICATIONS, LLC 829C CAMDEN NJ
2014-12-24 216-512 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F CLEVELAND OH
2014-12-24 236-331 not yet reported which blocks → Bell Mobility 6574 Prince George —
2014-12-24 239-307 0–9 XXXall 10 · 6 holders which blocks → ORLANDO TELEPHONE COMPANY DBA SUMMIT BROADBAND 7857 NAPLES FL
2014-12-24 249-377 not yet reported which blocks → Bell Mobility 6574 Sudbury —
2014-12-24 251-333 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E MOBILE AL
2014-12-24 315-969 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC- NY 384C FABIUS NY
2014-12-24 315-974 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC- NY 384C CAMDEN NY
2014-12-24 317-820 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C INDIANAPLS IN
2014-12-24 317-939 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J BROWNSBURG IN
2014-12-24 320-417 4XXX7XXX · 2 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J W DANBURY MN
2014-12-24 346-206 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - TX 903C SATSUMA TX
2014-12-24 386-319 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E LAKE CITY FL
2014-12-24 407-917 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E ORLANDO FL

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.