NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 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 21
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
2021-01-28 878-233 0XXX1XXX2XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F PRINCETON PA
2021-01-28 908-589 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NJ 637C SOMERVILLE NJ
2021-01-28 916-907 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C FAIR OAKS CA
2021-01-28 936-810 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - TX 903C TIMPSON TX
2021-01-28 971-393 0–9 XXXall 10 · 4 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J PORTLAND OR
2021-01-28 984-274 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CLAYTON NC
2021-01-28 989-364 0–9 XXXall 10 · 6 holders which blocks → IP HORIZON LLC 515J SAGINAW MI
2021-01-27 206-970 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WA 483E SEATTLE WA
2021-01-27 252-479 0–9 XXXall 10 · 5 holders which blocks → STRATUS NETWORKS 495J WILSON NC
2021-01-27 254-509 0XXX2XXX3XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - TX 903C BREMOND TX
2021-01-27 254-810 0XXX1XXX2XXX8XXX · 3 holders which blocks → ONVOY, LLC - TX 903C JONESBORO TX
2021-01-27 276-249 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 STUART VA
2021-01-27 316-375 0–9 XXXall 10 · 3 holders which blocks → STRATUS NETWORKS 495J NEWTON KS
2021-01-27 364-205 0–9 XXXall 10 · 2 holders which blocks → IP HORIZON LLC 515J BOWLNGGREN KY
2021-01-27 365-440 not yet reported which blocks → Bell Mobility 6574 Brampton —
2021-01-27 413-434 0XXX1XXX2XXX3XXX4XXX5XXX · 3 holders which blocks → ONVOY, LLC - MA 892D GILBERTVL MA
2021-01-27 413-656 0XXX1XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - MA 892D MONTAGUE MA
2021-01-27 502-676 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J LOUISVILLE KY
2021-01-27 513-809 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 LEBANON OH
2021-01-27 513-822 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 MIDDLETOWN OH
2021-01-27 551-317 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NJ 637C DUMONT NJ
2021-01-27 561-590 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2021-01-27 585-803 1XXX2XXX3XXX4XXX5XXX · 3 holders which blocks → ONVOY, LLC- NY 384C ATLANTA NY
2021-01-27 585-804 0XXX1XXX2XXX4XXX5XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC- NY 384C AVON NY
2021-01-27 585-809 0XXX1XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC- NY 384C CANANDAGUA NY
2021-01-27 585-812 0XXX1XXX2XXX3XXX4XXX7XXX8XXX · 6 holders which blocks → ONVOY, LLC- NY 384C LE ROY NY
2021-01-27 585-816 0XXX2XXX3XXX5XXX8XXX · 3 holders which blocks → ONVOY, LLC- NY 384C NAPLES NY
2021-01-27 585-817 0XXX1XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC- NY 384C PAVILION NY
2021-01-27 585-818 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → ONVOY, LLC- NY 384C PERRY NY
2021-01-27 585-819 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC- NY 384C SCOTTSVL NY
2021-01-27 585-821 0XXX1XXX2XXX3XXX5XXX7XXX8XXX · 6 holders which blocks → ONVOY, LLC- NY 384C STANLEY NY
2021-01-27 585-822 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → ONVOY, LLC- NY 384C W WEBSTER NY
2021-01-27 585-823 2XXX3XXX4XXX6XXX · 3 holders which blocks → ONVOY, LLC- NY 384C WARSAW NY
2021-01-27 585-824 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → ONVOY, LLC- NY 384C WAYLAND NY
2021-01-27 585-825 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C WEBSTER NY
2021-01-27 607-402 0XXX1XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → STRATUS NETWORKS 495J CORTLAND NY
2021-01-27 619-626 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C EL CAJON CA
2021-01-27 628-388 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H INVERNESS CA
2021-01-27 628-399 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SNFC MT-EV CA
2021-01-27 631-945 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC- NY 384C GREENPORT NY
2021-01-27 631-970 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC- NY 384C MATTITUCK NY
2021-01-27 631-985 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC- NY 384C RIVERHEAD NY
2021-01-27 631-986 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C SMITHTOWN NY
2021-01-27 657-566 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H FULLERTON CA
2021-01-27 669-388 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SNJS WEST CA
2021-01-27 680-220 0XXX2XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 MADRID NY
2021-01-27 743-910 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NC 638E GREENSBORO NC
2021-01-27 747-305 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 BRBN BRBN CA
2021-01-27 747-599 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H AGOURA CA
2021-01-27 747-688 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H GLENDALE CA

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.