NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2016-07-18 317-499 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 INDIANAPLS IN
2016-07-18 323-986 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 04 CA
2016-07-18 346-762 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 RICHMNRNBG TX
2016-07-18 385-254 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - UT 871E PROVO UT
2016-07-18 424-380 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C INGLEWOOD CA
2016-07-18 438-405 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2016-07-18 438-406 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2016-07-18 469-886 0–9 XXXall 10 · 8 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DALLAS TX
2016-07-18 831-353 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C WATSONVL CA
2016-07-18 857-762 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 BOSTON MA
2016-07-18 873-870 not yet reported which blocks → Videotron Ltd. 8306 Aylmer —
2016-07-18 873-880 not yet reported which blocks → Videotron Ltd. 8306 Gatineau —
2016-07-18 954-405 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 FTLAUDERDL FL
2016-07-18 970-893 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CO 026D FT COLLINS CO
2016-07-15 323-961 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2016-07-15 412-699 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2016-07-15 510-906 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - CA 649C OKLD ALMD CA
2016-07-15 510-949 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - CA 649C HRCUL-RODE CA
2016-07-15 515-723 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 DES MOINES IA
2016-07-15 567-757 2XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → WINDSTREAM OHIO, LLC 0665 NEAPOLIS OH
2016-07-15 650-680 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 LOS ALTOS CA
2016-07-15 661-593 0–9 XXXall 10 · 8 holders which blocks → T-MOBILE USA, INC. 6529 SNCA NHCS CA
2016-07-15 662-867 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - MS 719E MABEN MS
2016-07-15 662-885 0XXX1XXX2XXX3XXX4XXX6XXX8XXX · 4 holders which blocks → ONVOY, LLC - MS 719E MCCOOL MS
2016-07-15 828-999 0–9 XXXall 10 · 4 holders which blocks → SOUTH CAROLINA NET, INC. - NC 511C HICKORY NC
2016-07-15 831-268 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - CA 649C FELTON CA
2016-07-15 928-256 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 YUMA AZ
2016-07-15 937-807 0XXX2XXX3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → WINDSTREAM OHIO, LLC 0665 COVINGTON OH
2016-07-15 940-314 0–9 XXXall 10 · 3 holders which blocks → TEXAS WINDSTREAM, LLC 2153 NOCONA TX
2016-07-14 346-760 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 BARKER TX
2016-07-14 346-843 0–9 XXXall 10 · 7 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 RICHMNRNBG TX
2016-07-14 484-360 0XXX2XXX8XXX9XXX · 4 holders which blocks → WINDSTREAM CONESTOGA, INC. 0162 BIRDSBORO PA
2016-07-14 551-274 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F KEARNY NJ
2016-07-14 628-245 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C MILLVALLEY CA
2016-07-14 646-953 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 NWYRCYZN01 NY
2016-07-14 657-338 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2016-07-14 814-869 0XXX1XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 COLVER PA
2016-07-14 862-291 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PASSAIC NJ
2016-07-13 216-760 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2016-07-13 331-757 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 LEMONT IL
2016-07-13 458-757 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OR 750E MILTONFWTR OR
2016-07-13 520-317 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AZ 630E HAYDEN AZ
2016-07-13 580-671 0XXX6XXX9XXX · 3 holders which blocks → WINDSTREAM OKLAHOMA, INC. 1965 MT VIEW OK
2016-07-13 580-961 0XXX1XXX6XXX9XXX · 4 holders which blocks → WINDSTREAM OKLAHOMA, INC. 1965 STRINGTOWN OK
2016-07-13 580-962 9XXX which blocks → WINDSTREAM OKLAHOMA, INC. 1965 BURNS FLAT OK
2016-07-13 581-573 not yet reported which blocks → TELUS Mobility 8303 Lac-Etchemin —
2016-07-13 702-890 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2016-07-13 708-882 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2016-07-13 740-672 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CHILLICOTH OH
2016-07-13 786-864 0–9 XXXall 10 · 3 holders which blocks → IDT AMERICA CORP. - FL 765A MIAMI FL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.