NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2023-08-10 769-225 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MS 719E MADISON MS
2023-08-10 808-459 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 HONOLULU HI
2023-08-10 831-203 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J SALINAS CA
2023-08-10 839-248 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - SC 548E AIKEN SC
2023-08-10 858-317 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → COMMIO, LLC 939H DULZURA CA
2023-08-10 862-426 0–9 XXXall 10 · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NJ 4948 BOONTON NJ
2023-08-10 862-427 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 NETCONG NJ
2023-08-10 971-456 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 TILLAMOOK OR
2023-08-10 980-203 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NC 638E GASTONIA NC
2023-08-10 980-252 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NC 638E DAVIDSON NC
2023-08-10 980-336 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NC 638E KINGS MT NC
2023-08-10 980-437 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - NC 638E BESSEMERCY NC
2023-08-10 980-438 0XXX2XXX4XXX · 2 holders which blocks → ONVOY, LLC - NC 638E LOCUST NC
2023-08-10 980-440 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NC 638E CONCORD NC
2023-08-10 980-450 0XXX2XXX · 2 holders which blocks → ONVOY, LLC - NC 638E PEACHLPKTN NC
2023-08-09 215-610 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - PA 547E PHLDLPHZN1 PA
2023-08-09 249-952 not yet reported which blocks → Fibernetics Corporation 464D Batchawana Bay —
2023-08-09 249-953 not yet reported which blocks → Fibernetics Corporation 464D Blind River —
2023-08-09 249-954 not yet reported which blocks → Fibernetics Corporation 464D Elliot Lake —
2023-08-09 249-955 not yet reported which blocks → Fibernetics Corporation 464D Sault Ste. Marie —
2023-08-09 276-307 0XXX1XXX2XXX3XXX7XXX · 5 holders which blocks → TWILIO INTERNATIONAL, INC. 506J LAURELFORK VA
2023-08-09 276-308 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - VA 138E LEBANON VA
2023-08-09 276-309 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E NORTON VA
2023-08-09 316-232 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - KS 205F WICHITA KS
2023-08-09 331-297 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC 224C BATAVIA IL
2023-08-09 331-298 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC 224C NAPERVILLE IL
2023-08-09 365-982 not yet reported which blocks → Fibernetics Corporation 464D Binbrook —
2023-08-09 365-983 not yet reported which blocks → Fibernetics Corporation 464D Dundas —
2023-08-09 365-984 not yet reported which blocks → Fibernetics Corporation 464D Grimsby —
2023-08-09 365-985 not yet reported which blocks → Fibernetics Corporation 464D West Lincoln —
2023-08-09 365-986 not yet reported which blocks → Fibernetics Corporation 464D Winona —
2023-08-09 380-261 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DUBLIN OH
2023-08-09 385-550 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - UT 871E BOUNTIFUL UT
2023-08-09 407-689 0–9 XXXwhole prefix which blocks → LIVEWIRE TELECOM, LLC 693K ORLANDO FL
2023-08-09 412-484 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PTTSBGZON1 PA
2023-08-09 419-997 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → COMMIO, LLC 939H EDON OH
2023-08-09 435-354 0XXX1XXX2XXX3XXX5XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TOOELE UT
2023-08-09 442-412 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H BRAWLEY CA
2023-08-09 507-957 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANKATO MN
2023-08-09 510-312 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H CROCKETT CA
2023-08-09 567-416 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TOLEDO OH
2023-08-09 571-546 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2023-08-09 628-292 0–9 XXXall 10 · 2 holders which blocks → COMMIO, LLC 939H BELVEDERE CA
2023-08-09 628-293 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → COMMIO, LLC 939H NICASIO CA
2023-08-09 667-445 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 CATONSVL MD
2023-08-09 765-803 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 KOKOMO IN
2023-08-09 835-225 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 ALLENTOWN PA
2023-08-09 907-217 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ANCHORAGE AK
2023-08-09 936-354 0XXX1XXX2XXX3XXX6XXX9XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 HUNTSVILLE TX
2023-08-09 943-567 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - GA 8392 ATLANTA GA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.