NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
2021-06-18 463-466 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H WESTNEWTON IN
2021-06-18 574-577 5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - IN 097D ROYAL CTR IN
2021-06-18 608-671 0–9 XXXall 10 · 5 holders which blocks → UNITED STATES CELLULAR - WI 6274 BELOIT WI
2021-06-18 618-750 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLLINSVL IL
2021-06-18 620-512 0XXX1XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - KS 986E OXFORD KS
2021-06-18 680-227 2XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC- NY 384C SAVANNAH NY
2021-06-18 737-289 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2021-06-18 742-200 not yet reported which blocks → IXICA Communications Inc. 812H Richmond Hill —
2021-06-18 742-666 not yet reported which blocks → IXICA Communications Inc. 812H St. Catharines-Thorold —
2021-06-18 742-700 not yet reported which blocks → IXICA Communications Inc. 812H Burlington —
2021-06-18 742-777 not yet reported which blocks → IXICA Communications Inc. 812H Markham —
2021-06-18 765-695 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H FRANKFORT IN
2021-06-18 765-718 0XXX1XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H MECHANSBG IN
2021-06-18 765-782 2XXX4XXX5XXX7XXX · 4 holders which blocks → ONVOY, LLC - IN 097D KNIGHTSTN IN
2021-06-18 772-253 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E HOBE SOUND FL
2021-06-18 945-201 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2021-06-17 206-532 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SEATTLE WA
2021-06-17 223-266 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H LANCASTER PA
2021-06-17 223-403 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H LANDISVL PA
2021-06-17 223-433 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H LOGANVILLE PA
2021-06-17 279-587 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H PLEASATGRV CA
2021-06-17 320-410 0XXX2XXX7XXX · 3 holders which blocks → ONVOY, LLC - MN 184D ASKOV MN
2021-06-17 320-588 2XXX5XXX8XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H FINLAYSON MN
2021-06-17 405-993 0XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → ONVOY, LLC - OK 409F CHOCTAW OK
2021-06-17 424-449 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CMTN CMTN CA
2021-06-17 424-587 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H CULVERCITY CA
2021-06-17 440-705 0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H MIDDLEFLD OH
2021-06-17 440-757 5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H NEWBURY OH
2021-06-17 440-765 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H RUSSELL OH
2021-06-17 440-767 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H PAINESVL OH
2021-06-17 440-778 1XXX2XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H PIERPONT OH
2021-06-17 470-817 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2021-06-17 505-472 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 AZTEC NM
2021-06-17 512-631 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C AUSTIN TX
2021-06-17 539-248 0XXX2XXX8XXX · 2 holders which blocks → ONVOY, LLC - OK 409F BARNSDALL OK
2021-06-17 539-252 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OK 409F BROKENARRW OK
2021-06-17 539-253 2XXX3XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC - OK 409F QUAPAW OK
2021-06-17 539-254 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - OK 409F SPIRO OK
2021-06-17 562-516 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DOWNEY CA
2021-06-17 573-602 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MO 093F ELDON MO
2021-06-17 582-282 0XXX2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H CORSICA PA
2021-06-17 582-302 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H DAYTON PA
2021-06-17 582-442 0XXX1XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H GLENCMPBLL PA
2021-06-17 582-482 2XXX3XXX4XXX6XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H HAWTHORN PA
2021-06-17 582-583 0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H HAZEN PA
2021-06-17 607-395 2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC- NY 384C DUNDEE NY
2021-06-17 628-587 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H NOVATO CA
2021-06-17 636-204 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MO 093F WARRENTON MO
2021-06-17 651-422 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY SPECTRUM, LLC 624H NORTH BRCH MN
2021-06-17 651-477 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H STCROIXBCH MN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.