NumberResearch Membership · Data 09/28/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2020-07-14 430-275 0–9 XXXall 10 · 2 holders which blocks → E. RITTER COMMUNICATIONS, LLC 128L TEXARKANA TX
2020-07-14 458-666 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H BEND OR
2020-07-14 480-933 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H PHOENIX AZ
2020-07-14 505-416 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 SANTA FE NM
2020-07-14 509-816 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SPOKANE WA
2020-07-14 539-529 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H BARTLESVL OK
2020-07-14 539-577 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H MIAMI OK
2020-07-14 540-844 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H DAHLGREN VA
2020-07-14 571-470 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2020-07-14 602-755 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H PHOENIX AZ
2020-07-14 623-400 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H PHOENIX AZ
2020-07-14 779-356 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H CRYSTAL LK IL
2020-07-14 779-599 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H PAW PAW IL
2020-07-14 779-766 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FRACTEL, LLC 965H DEPUE IL
2020-07-14 779-877 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H VERONA IL
2020-07-14 779-899 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H LISBON IL
2020-07-14 779-946 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 6 holders which blocks → FRACTEL, LLC 965H GRANVILLE IL
2020-07-14 779-977 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H HARVARD IL
2020-07-14 872-362 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H CHICGOZN05 IL
2020-07-14 872-758 0–9 XXXall 10 · 8 holders which blocks → FRACTEL, LLC 965H CHICGOZN10 IL
2020-07-14 872-766 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H CHICGOZN01 IL
2020-07-14 925-410 0–9 XXXwhole prefix which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PLEASANTON CA
2020-07-14 928-385 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 KINGMAN AZ
2020-07-14 971-465 0–9 XXXall 10 · 9 holders which blocks → FRACTEL, LLC 965H DALLAS OR
2020-07-14 971-758 0XXX1XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H CARLTON OR
2020-07-14 971-946 3XXX4XXX · 2 holders which blocks → FRACTEL, LLC 965H ST PAUL OR
2020-07-13 206-635 0–9 XXXall 10 · 6 holders which blocks → CSC WIRELESS, LLC 425J SEATTLE WA
2020-07-13 224-722 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H ELK GROVE IL
2020-07-13 251-465 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H MOBILE AL
2020-07-13 251-758 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H MT VERNON AL
2020-07-13 251-766 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H JACKSON AL
2020-07-13 251-842 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H PETERMAN AL
2020-07-13 251-877 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H FOWL RIVER AL
2020-07-13 276-788 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H MARTINSVL VA
2020-07-13 334-822 1XXX2XXX3XXX4XXX5XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H BRANTLEY AL
2020-07-13 334-829 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H OAKLAND AL
2020-07-13 334-867 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H GENEVA AL
2020-07-13 334-966 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H HARTFORD AL
2020-07-13 434-344 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FRACTEL, LLC 965H LA CROSSE VA
2020-07-13 434-567 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H SOBRUNSWIK VA
2020-07-13 434-677 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H VICTORIA VA
2020-07-13 434-732 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H GLADSTONE VA
2020-07-13 434-788 0XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H KENBRIDGE VA
2020-07-13 434-877 4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H FORK UNION VA
2020-07-13 515-513 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J DES MOINES IA
2020-07-13 540-240 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H ROANOKE VA
2020-07-13 612-842 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H TWINCITIES MN
2020-07-13 659-336 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H CENTREVL AL
2020-07-13 659-348 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BESSEMER AL
2020-07-13 659-655 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 5 holders which blocks → FRACTEL, LLC 965H HACKLEBURG AL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.