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
2020-09-08 276-966 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H HILLSVILLE VA
2020-09-08 276-977 6XXX7XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H FT BLACKMR VA
2020-09-08 313-998 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C DETROITZN1 MI
2020-09-08 326-356 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H BELFAST OH
2020-09-08 332-237 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J NWYRCYZN01 NY
2020-09-08 380-345 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H HILLIARD OH
2020-09-08 385-362 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2020-09-08 385-369 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2020-09-08 413-389 0–9 XXXall 10 · 2 holders which blocks → IP HORIZON LLC 515J SPRINGFLD MA
2020-09-08 424-447 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 INGLEWOOD CA
2020-09-08 425-477 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D ISSAQUAH WA
2020-09-08 431-244 not yet reported which blocks → Iristel Inc. 154E Stonewall —
2020-09-08 434-241 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J LYNCHBURG VA
2020-09-08 434-399 3XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H RENAN VA
2020-09-08 434-622 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H CREWE VA
2020-09-08 434-633 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H CONCORD VA
2020-09-08 434-644 0XXX1XXX2XXX4XXX5XXX6XXX · 5 holders which blocks → FRACTEL, LLC 965H BURKEVILLE VA
2020-09-08 434-655 0XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H BRODNAX VA
2020-09-08 434-722 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H BARNESVL VA
2020-09-08 434-844 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H ALLWOOD VA
2020-09-08 434-899 0XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H BLACKRIDGE VA
2020-09-08 434-966 0XXX1XXX6XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BEECHWOOD VA
2020-09-08 442-331 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-09-08 442-332 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2020-09-08 463-529 1XXX2XXX3XXX4XXX7XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H TRAFALGAR IN
2020-09-08 463-842 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H WHITELAND IN
2020-09-08 470-650 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA 7435 ATLANTA GA
2020-09-08 506-699 not yet reported which blocks → Iristel Inc. 154E Shippagan —
2020-09-08 507-739 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANKATO MN
2020-09-08 540-647 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J ROANOKE VA
2020-09-08 540-930 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E STAFFORD VA
2020-09-08 562-518 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LONG BEACH CA
2020-09-08 567-758 0XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H FREMONT OH
2020-09-08 567-786 2XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H REDHAW OH
2020-09-08 567-842 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H LAKEVILLE OH
2020-09-08 573-630 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 6123 BONNETERRE MO
2020-09-08 607-370 0XXX1XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → IP HORIZON LLC 515J BINGHAMTON NY
2020-09-08 608-367 0–9 XXXall 10 · 3 holders which blocks → STRATUS NETWORKS 495J BELOIT WI
2020-09-08 619-418 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2020-09-08 623-265 0–9 XXXall 10 · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J PHOENIX AZ
2020-09-08 661-506 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-09-08 680-216 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J SYRACUSE NY
2020-09-08 716-306 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J BUFFALO NY
2020-09-08 737-275 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F GEORGETOWN TX
2020-09-08 754-255 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E POMPANOBCH FL
2020-09-08 757-974 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J NRFOLKZON2 VA
2020-09-08 774-436 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J WORCESTER MA
2020-09-08 779-296 1XXX2XXX · 2 holders which blocks → STRATUS NETWORKS 495J LONG POINT IL
2020-09-08 804-613 0–9 XXXall 10 · 6 holders which blocks → IP HORIZON LLC 515J RICHMOND VA
2020-09-08 808-470 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - HI 9414 HONOLULU HI

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.