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
2023-06-23 873-583 not yet reported which blocks → Fibernetics Corporation 464D Windsor —
2023-06-23 904-816 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C ORANGEPARK FL
2023-06-23 904-817 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C FERNADNBCH FL
2023-06-23 904-925 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C ST JOHNS FL
2023-06-23 986-257 0XXX1XXX2XXX3XXX · 2 holders which blocks → ONVOY, LLC - ID 689F RATHDRUM ID
2023-06-23 986-258 0XXX1XXX3XXX · 3 holders which blocks → ONVOY, LLC - ID 689F ALBENI ID
2023-06-23 986-259 0XXX3XXX · 2 holders which blocks → ONVOY, LLC - ID 689F MULLAN ID
2023-06-23 986-260 0XXX3XXX · 2 holders which blocks → ONVOY, LLC - ID 689F WEIPPE ID
2023-06-23 986-261 0XXX3XXX7XXX · 3 holders which blocks → ONVOY, LLC - ID 689F KAMIAH ID
2023-06-23 986-262 1XXX2XXX3XXX5XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - ID 689F ST MARIES ID
2023-06-22 209-393 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C SNRA JUNO CA
2023-06-22 216-483 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OH 464C TERRACE OH
2023-06-22 219-337 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - IN 097D MERRILLVL IN
2023-06-22 219-338 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D CEDAR LAKE IN
2023-06-22 234-373 2XXX3XXX · 2 holders which blocks → ONVOY, LLC - OH 464C DAMASCUS OH
2023-06-22 272-324 0XXX1XXX2XXX4XXX7XXX · 4 holders which blocks → ONVOY, LLC - PA 547E DINGMAFRRY PA
2023-06-22 272-325 0XXX2XXX5XXX7XXX · 3 holders which blocks → ONVOY, LLC - PA 547E MATAMORAS PA
2023-06-22 279-238 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C SCRM MAIN CA
2023-06-22 279-239 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C FOLSOM CA
2023-06-22 310-269 0–9 XXXall 10 · 5 holders which blocks → UTILITY TELECOM GROUP, LLC - CA 9262 BEVERLYHLS CA
2023-06-22 318-890 0XXX which blocks → ONVOY SPECTRUM, LLC 624H WATERPROOF LA
2023-06-22 318-975 0XXX which blocks → ONVOY SPECTRUM, LLC 624H ZWOLLE LA
2023-06-22 318-983 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H WINNFIELD LA
2023-06-22 325-339 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ABILENE TX
2023-06-22 334-891 0XXX1XXX2XXX · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J HEADLAND AL
2023-06-22 346-724 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C LANGHAMCRK TX
2023-06-22 346-734 0XXX1XXX2XXX4XXX7XXX8XXX · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J BEACH CITY TX
2023-06-22 354-227 not yet reported which blocks → ISP Telecom Inc. 4727 Hemmingford —
2023-06-22 354-533 not yet reported which blocks → ISP Telecom Inc. 4727 Mirabel-Ste-Scholastique —
2023-06-22 367-476 not yet reported which blocks → ISP Telecom Inc. 4727 Girardville —
2023-06-22 367-752 not yet reported which blocks → ISP Telecom Inc. 4727 Hebertville —
2023-06-22 367-848 not yet reported which blocks → ISP Telecom Inc. 4727 La Dore —
2023-06-22 380-268 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C COLUMBUS OH
2023-06-22 385-541 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - UT 871E SALT LAKE UT
2023-06-22 385-542 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - UT 871E MURRAY UT
2023-06-22 385-543 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - UT 871E SPRINGVL UT
2023-06-22 385-544 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - UT 871E KAYSVILLE UT
2023-06-22 409-310 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GALVESTON TX
2023-06-22 432-323 9XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J MIDLAND TX
2023-06-22 442-410 3XXX4XXX · 2 holders which blocks → ONVOY, LLC - CA 649C KERNVILLE CA
2023-06-22 520-680 0XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - AZ 630E BISBEE AZ
2023-06-22 559-863 0XXX3XXX6XXX8XXX · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J DUNLAP CA
2023-06-22 586-368 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C WARREN MI
2023-06-22 608-353 0XXX2XXX3XXX8XXX · 4 holders which blocks → ONVOY, LLC - WI 225C MELROSE WI
2023-06-22 608-809 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → ONVOY, LLC - WI 225C BARABOO WI
2023-06-22 614-380 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 REYNOLDSBG OH
2023-06-22 615-842 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GOODLETSVL TN
2023-06-22 661-743 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LANCASTER CA
2023-06-22 719-801 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CO 7378 COLORDOSPG CO
2023-06-22 719-802 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CO 7378 COLORDOSPG CO

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.