NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
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
2020-09-14 681-331 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J MORGANTOWN WV
2020-09-14 681-338 1XXX3XXX7XXX8XXX9XXX · 5 holders which blocks → IP HORIZON LLC 515J BLUEFIELD WV
2020-09-14 709-399 not yet reported which blocks → Iristel Inc. 154E Upper Island Cove —
2020-09-14 725-257 0–9 XXXwhole prefix which blocks → ONVOY, LLC - NV 029F LAS VEGAS NV
2020-09-14 878-227 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 BEAVER FLS PA
2020-09-14 959-876 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 HARTFORD CT
2020-09-14 986-786 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - ID 689F PARMA ID
2020-09-11 234-283 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 WARREN OH
2020-09-11 236-879 not yet reported which blocks → ISP Telecom Inc. 4727 Port Moody —
2020-09-11 251-335 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NUSO, LLC 478J MELVIN AL
2020-09-11 256-816 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CULLMAN AL
2020-09-11 260-946 0XXX1XXX2XXX3XXX4XXX5XXX · 5 holders which blocks → FRACTEL, LLC 965H CHURUBUSCO IN
2020-09-11 267-936 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F PERKASIE PA
2020-09-11 343-342 not yet reported which blocks → Iristel Inc. 154E Vankleek Hill —
2020-09-11 343-894 not yet reported which blocks → Fibernetics Corporation 464D Sydenham —
2020-09-11 346-437 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 HSTNSUBURB TX
2020-09-11 380-218 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 COLUMBUS OH
2020-09-11 445-202 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J PHLDLPHZN1 PA
2020-09-11 548-566 not yet reported which blocks → Fibernetics Corporation 464D Glencoe —
2020-09-11 548-567 not yet reported which blocks → Fibernetics Corporation 464D Lambeth —
2020-09-11 548-568 not yet reported which blocks → Fibernetics Corporation 464D Parkhill —
2020-09-11 574-977 0XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H WYATT IN
2020-09-11 660-724 6XXX7XXX · 2 holders which blocks → FRACTEL, LLC 965H UNIONVILLE MO
2020-09-11 660-732 0XXX5XXX · 2 holders which blocks → FRACTEL, LLC 965H WYACONDA MO
2020-09-11 660-758 6XXX which blocks → FRACTEL, LLC 965H MT MORIAH MO
2020-09-11 660-842 5XXX which blocks → FRACTEL, LLC 965H POWERSVL MO
2020-09-11 682-335 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 GRAPEVINE TX
2020-09-11 709-220 not yet reported which blocks → TELUS Mobility 8303 Gander —
2020-09-11 719-370 0–9 XXXall 10 · 7 holders which blocks → NUSO, LLC 478J COLORDOSPG CO
2020-09-11 720-742 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2020-09-11 740-764 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 ATHENS OH
2020-09-11 782-201 not yet reported which blocks → Iristel Inc. 154E Weymouth —
2020-09-11 782-202 not yet reported which blocks → Iristel Inc. 154E Summerside —
2020-09-11 782-482 not yet reported which blocks → Iristel Inc. 154E Halifax —
2020-09-11 813-687 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E TAMPAWST FL
2020-09-11 819-581 not yet reported which blocks → Iristel Inc. 154E Gatineau —
2020-09-11 850-923 0XXX1XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - FL 937C GLENDALE FL
2020-09-11 930-217 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 4 holders which blocks → POWERTEL KENTUCKY LICENSES, INC. 365C MADISON IN
2020-09-11 930-400 0XXX1XXX2XXX3XXX4XXX · 4 holders which blocks → FRACTEL, LLC 965H EENTERPRIS IN
2020-09-11 930-877 0XXX1XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H ST ANTHONY IN
2020-09-11 930-933 3XXX4XXX5XXX · 2 holders which blocks → FRACTEL, LLC 965H SHOALS IN
2020-09-11 930-977 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H SOLITUDE IN
2020-09-11 984-282 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E PITTSBORO NC
2020-09-10 343-892 not yet reported which blocks → Fibernetics Corporation 464D Bath —
2020-09-10 343-893 not yet reported which blocks → Fibernetics Corporation 464D Napanee —
2020-09-10 440-674 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ELYRIA OH
2020-09-10 458-252 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 478J OREGONSLOP OR
2020-09-10 502-308 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 478J LOUISVILLE KY
2020-09-10 507-740 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 MANKATO MN
2020-09-10 575-346 2XXX3XXX · 2 holders which blocks → FRACTEL, LLC 965H CORONA NM

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.