NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
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
2020-07-10 424-842 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H W ANGELES CA
2020-07-10 431-408 not yet reported which blocks → LES.NET (1996) Inc. 141F St. Adolphe —
2020-07-10 442-688 0XXX4XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H PALO VERDE CA
2020-07-10 458-250 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J EUGENE OR
2020-07-10 479-389 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROGERS AR
2020-07-10 513-689 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 LEBANON OH
2020-07-10 559-699 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H VISALIA CA
2020-07-10 559-955 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H TIVYVALLEY CA
2020-07-10 562-844 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H ALAMITOS CA
2020-07-10 562-955 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H DOWNEY CA
2020-07-10 571-544 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H WSNGTNZN19 VA
2020-07-10 571-677 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H DALE CITY VA
2020-07-10 571-755 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H HAYMARKET VA
2020-07-10 571-786 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H HERNDON VA
2020-07-10 571-899 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H WSNGTNZN17 VA
2020-07-10 571-946 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H MANASSAS VA
2020-07-10 571-977 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H WSNGTNZN08 VA
2020-07-10 626-889 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H COVINA CA
2020-07-10 628-348 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H BELVEDERE CA
2020-07-10 628-688 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SNFC CNTRL CA
2020-07-10 628-732 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H SNFC JUNPR CA
2020-07-10 628-766 0XXX1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H STNSN-BLNS CA
2020-07-10 628-977 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H SNFC MT-EV CA
2020-07-10 650-668 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H LOS ALTOS CA
2020-07-10 657-786 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H SANTA ANA CA
2020-07-10 657-799 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H FULLERTON CA
2020-07-10 657-842 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H ANAHEIM CA
2020-07-10 657-867 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H HUNTITNBCH CA
2020-07-10 657-946 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H SILVERADO CA
2020-07-10 669-732 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H SUNNYVALE CA
2020-07-10 747-377 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H VAN NUYS CA
2020-07-10 820-465 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H OXNARD CA
2020-07-10 820-732 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H VNTRA CNTL CA
2020-07-10 820-758 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SANBARBARA CA
2020-07-10 820-946 0–9 XXXall 10 · 8 holders which blocks → FRACTEL, LLC 965H SANTAMARIA CA
2020-07-10 858-599 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H NATIONALCY CA
2020-07-10 858-867 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SNDG SNDG CA
2020-07-10 870-789 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EL DORADO AR
2020-07-10 949-736 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H NEWPORTBCH CA
2020-07-10 949-744 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H IRVINE CA
2020-07-10 956-733 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H WESLACO TX
2020-07-10 956-955 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H LAREDO TX
2020-07-10 971-380 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J PORTLAND OR
2020-07-09 209-539 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MANTECA CA
2020-07-09 254-588 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H MERIDIAN TX
2020-07-09 334-746 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J MONTGOMERY AL
2020-07-09 346-432 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H HSTNSUBURB TX
2020-07-09 346-477 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H HUMBLE TX
2020-07-09 346-488 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H PORTER HTS TX
2020-07-09 346-577 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H HOUSTON TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.