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
2018-12-24 725-735 0–9 XXXall 10 · 6 holders which blocks → HD CARRIER LLC 321J LAS VEGAS NV
2018-12-24 808-913 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - HI 003J HONOLULU HI
2018-12-24 820-888 0–9 XXXall 10 · 6 holders which blocks → TERRA NOVA TELECOM INC. 145J SIMIVALLEY CA
2018-12-24 929-503 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN07 NY
2018-12-24 929-605 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN06 NY
2018-12-24 951-477 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 MURRIETA CA
2018-12-21 220-777 0–9 XXXall 10 · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J COSHOCTON OH
2018-12-21 234-888 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J AKRON OH
2018-12-21 240-564 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 LAUREL236 MD
2018-12-21 431-646 not yet reported which blocks → RFNow Inc. 346G Carberry —
2018-12-21 431-647 not yet reported which blocks → RFNow Inc. 346G Pipestone —
2018-12-21 507-999 3XXX7XXX8XXX9XXX · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J GAYLORD MN
2018-12-21 574-888 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J SOUTH BEND IN
2018-12-21 603-406 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 CONCORD NH
2018-12-21 603-416 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 RAYMOND NH
2018-12-21 667-259 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 REISTERSTN MD
2018-12-21 725-216 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 LAS VEGAS NV
2018-12-21 850-280 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C FTWALTNBCH FL
2018-12-20 236-478 not yet reported which blocks → TELUS 8086 Victoria —
2018-12-20 254-345 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COPPERASCV TX
2018-12-20 346-375 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SUGAR LAND TX
2018-12-20 435-375 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ST GEORGE UT
2018-12-20 513-993 0–9 XXXall 10 · 5 holders which blocks → HD CARRIER LLC 321J CINCINNATI OH
2018-12-20 573-753 0XXX which blocks → CHARTER IP ENABLED SERVICES, LLC 792K STEELVILLE MO
2018-12-20 573-849 0XXX which blocks → CHARTER IP ENABLED SERVICES, LLC 792K FARBER MO
2018-12-20 581-937 not yet reported which blocks → Videotron Ltd. 8306 Saint-Magloire —
2018-12-20 581-938 not yet reported which blocks → Videotron Ltd. 8306 Saint-Odilon —
2018-12-20 581-939 not yet reported which blocks → Videotron Ltd. 8306 Saint-Zacharie —
2018-12-20 775-438 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NV 029F LATHROWLLS NV
2018-12-20 989-919 0XXX2XXX · 2 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F ST HELEN MI
2018-12-19 202-913 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC 6402 WSHNGTNZN1 DC
2018-12-19 365-877 not yet reported which blocks → Bell Canada 8051 Milton —
2018-12-19 401-205 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J PAWTUCKET RI
2018-12-19 540-531 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 MCCLUNG VA
2018-12-19 540-608 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 MOUNTANGRV VA
2018-12-19 540-637 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 MCDOWELL VA
2018-12-19 540-916 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WILLIAMSVL VA
2018-12-19 551-297 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 BAYONNE NJ
2018-12-19 581-931 not yet reported which blocks → Videotron Ltd. 8306 Saint-Malachie —
2018-12-19 581-932 not yet reported which blocks → Videotron Ltd. 8306 Lac-Etchemin —
2018-12-19 581-933 not yet reported which blocks → Videotron Ltd. 8306 Saint-Camille —
2018-12-19 581-934 not yet reported which blocks → Videotron Ltd. 8306 Sainte-Justine —
2018-12-19 581-935 not yet reported which blocks → Videotron Ltd. 8306 Sainte-Rose —
2018-12-19 581-936 not yet reported which blocks → Videotron Ltd. 8306 St-Just-de-Bretenieres —
2018-12-19 628-629 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J SNFC CNTRL CA
2018-12-19 647-658 not yet reported which blocks → Bell Mobility 6574 Toronto —
2018-12-19 725-214 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NV 029F LAS VEGAS NV
2018-12-19 725-215 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NV 029F SANDY VLY NV
2018-12-19 838-205 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → TC SYSTEMS, INC. - NY 7140 VALLEY FLS NY
2018-12-19 858-868 0–9 XXXall 10 · 5 holders which blocks → HD CARRIER LLC 321J SNDG SNDG CA

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.