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
2017-09-13 726-666 0–9 XXXall 10 · 4 holders which blocks → EVOLVE CELLULAR, INC. 139F SANANTONIO TX
2017-09-13 747-259 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CANOGAPARK CA
2017-09-13 774-355 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J BUZZARDSBY MA
2017-09-13 812-943 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 CRANE IN
2017-09-13 908-348 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ELIZABETH NJ
2017-09-13 949-316 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 IRVINE CA
2017-09-13 984-285 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NC 8389 BENSON NC
2017-09-12 407-407 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 ORLANDO FL
2017-09-12 412-785 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D PTTSBGZON1 PA
2017-09-12 469-325 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 MCKINNEY TX
2017-09-12 469-428 0–9 XXXall 10 · 4 holders which blocks → SOUTHWESTERN BELL 9533 FRISCO TX
2017-09-12 470-475 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA NE GA
2017-09-12 520-666 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AZ 630E CASAGRANDE AZ
2017-09-12 587-429 not yet reported which blocks → Videotron Ltd. 787G Calgary —
2017-09-12 587-566 not yet reported which blocks → Videotron Ltd. 787G Edmonton —
2017-09-12 650-379 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SSNFRNCSCO CA
2017-09-12 702-344 0–9 XXXall 10 · 3 holders which blocks → CASCADE ACCESS, LLC - NV 100J MESQUITE NV
2017-09-12 774-366 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MA 892D WORCESTER MA
2017-09-12 778-917 not yet reported which blocks → Videotron Ltd. 787G Vancouver —
2017-09-12 971-377 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OR 750E CLACKAMAS OR
2017-09-11 202-845 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 WSHNGTNZN1 DC
2017-09-11 463-222 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D FRANKLIN IN
2017-09-11 463-333 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - IN 097D CARMEL IN
2017-09-11 463-444 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - IN 097D GREENWOOD IN
2017-09-11 463-666 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - IN 097D MOORESVL IN
2017-09-11 463-888 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - IN 097D BROWNSBURG IN
2017-09-11 539-525 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J TULSA OK
2017-09-11 608-733 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MADISON WI
2017-09-11 804-718 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → VONAGE AMERICA LLC 197D RICHMOND VA
2017-09-09 340-423 not yet reported which blocks → VITELCOM CELLULAR, INC. 346D CHTAMSTTHS VI
2017-09-09 340-717 not yet reported which blocks → VITELCOM CELLULAR, INC. 346D CHTAMSTTHS VI
2017-09-09 340-725 not yet reported which blocks → VITELCOM CELLULAR, INC. 346D CHTAMSTTHS VI
2017-09-08 204-879 not yet reported which blocks → Provincial Tel Inc. 498E Lorette —
2017-09-08 856-557 0–9 XXXwhole prefix which blocks → BLOCK LINE SYSTEMS, LLC - NJ 835E PITMAN NJ
2017-09-08 867-671 not yet reported which blocks → Ice Wireless Inc. 630G Tuktoyaktuk —
2017-09-08 867-732 not yet reported which blocks → Ice Wireless Inc. 630G Behchoko —
2017-09-08 867-889 not yet reported which blocks → Ice Wireless Inc. 630G Inuvik —
2017-09-08 867-987 not yet reported which blocks → Ice Wireless Inc. 630G Yellowknife —
2017-09-07 205-584 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 BESSEMER AL
2017-09-07 206-536 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WA 483E SEATTLE WA
2017-09-07 214-433 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 WAXAHACHIE TX
2017-09-07 231-300 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C ALDEN MI
2017-09-07 346-268 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SPRING TX
2017-09-07 346-269 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HSTNSUBURB TX
2017-09-07 346-271 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F FRIENDSWD TX
2017-09-07 417-430 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGFLD MO
2017-09-07 432-999 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C TERMINAL TX
2017-09-07 458-777 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - OR 750E JEFFERSON OR
2017-09-07 458-999 0–9 XXXall 10 · 8 holders which blocks → ONVOY, LLC - OR 750E UMATILLA OR
2017-09-07 509-867 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H SPOKANE WA

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.