NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2010-05-07 910-973 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 FAYETTEVL NC
2010-05-06 319-423 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 CEDAR RPDS IA
2010-05-06 513-409 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 LEBANON OH
2010-05-06 619-633 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2010-05-06 657-205 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SANTA ANA CA
2010-05-06 845-213 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NEW CITY NY
2010-05-05 289-923 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Ajax-Pickering —
2010-05-05 289-924 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Georgetown —
2010-05-05 289-925 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Hamilton —
2010-05-05 289-926 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Newmarket —
2010-05-05 443-887 0–9 XXXwhole prefix which blocks → PAETEC ITEL, LLC 829J CATONSVL MD
2010-05-05 647-922 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2010-05-05 647-923 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2010-05-05 647-924 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2010-05-05 647-926 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2010-05-05 647-927 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2010-05-04 251-314 0–9 XXXall 10 · 4 holders which blocks → MCC TELEPHONY OF THE SOUTH, LLC - AL 773F BREWTON AL
2010-05-04 832-534 0–9 XXXall 10 · 6 holders which blocks → SOUTHWESTERN BELL 9533 TOMBALL TX
2010-05-03 218-438 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → WIKSTROM TELEPHONE COMPANY, INC. - MN 914F ARGYLE MN
2010-05-03 218-480 0XXX1XXX3XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → WIKSTROM TELEPHONE COMPANY, INC. - MN 914F STEPHEN MN
2010-05-03 254-270 not yet reported which blocks → AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-TX 0132 CROSS PL TX
2010-05-03 347-319 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 NWYRCYZN11 NY
2010-05-03 347-336 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 NWYRCYZN10 NY
2010-05-03 347-337 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 NWYRCYZN08 NY
2010-05-03 612-365 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9631 TWINCITIES MN
2010-05-03 801-874 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2010-05-03 985-534 not yet reported which blocks → SJI, L.L.C. - LA 769F LOCKPORT LA
2010-05-03 985-538 not yet reported which blocks → SJI, L.L.C. - LA 769F RACELAND LA
2010-04-30 347-318 0–9 XXXall 10 · 3 holders which blocks → CSC VOICE, LLC 612K NWYRCYZN06 NY
2010-04-30 484-838 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALLENTOWN PA
2010-04-30 484-891 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E ALLENTOWN PA
2010-04-30 571-231 0–9 XXXwhole prefix which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-04-30 712-750 not yet reported which blocks → PREMIER COMMUNICATIONS, INC. - IA 904D SIBLEY IA
2010-04-30 716-777 0–9 XXXall 10 · 4 holders which blocks → FINGER LAKES TECHNOLOGIES GROUP, INC. - NY 629E BUFFALO NY
2010-04-30 720-287 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J DENVER CO
2010-04-29 234-220 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 CORTLAND OH
2010-04-29 317-212 0–9 XXXwhole prefix which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
2010-04-29 469-764 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 MCKINNEY TX
2010-04-29 786-322 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 MIAMI FL
2010-04-29 956-307 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAREDO TX
2010-04-28 240-583 0–9 XXXall 10 · 4 holders which blocks → VERIZON MARYLAND, INC. 9212 LAUREL236 MD
2010-04-28 775-403 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F WINNEMUCCA NV
2010-04-27 256-926 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 HEFLIN AL
2010-04-27 604-563 not yet reported which blocks → Shaw Telecom Inc. 497E Vancouver —
2010-04-27 613-671 not yet reported which blocks → Bragg Communications Inc. 4878 Cardinal —
2010-04-27 778-440 not yet reported which blocks → Shaw Telecom Inc. 497E Victoria —
2010-04-26 204-494 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Arborg —
2010-04-26 347-317 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 NWYRCYZN03 NY
2010-04-26 414-877 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF WISCONSIN, LLC - WI 227F MILWAUKZN1 WI
2010-04-26 505-369 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NM 5470 ALBUQURQUE NM

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.