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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
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
2020-07-09 346-955 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H DICKINSON TX
2020-07-09 409-977 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H HTCHCCKSNF TX
2020-07-09 509-504 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 YAKIMA WA
2020-07-09 612-429 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J TWINCITIES MN
2020-07-09 647-316 not yet reported which blocks → IXICA Communications Inc. 812H Toronto —
2020-07-09 659-202 0–9 XXXall 10 · 6 holders which blocks → CSC WIRELESS, LLC 425J BIRMINGHAM AL
2020-07-09 682-946 3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H RHOME TX
2020-07-09 725-277 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H LAS VEGAS NV
2020-07-09 725-345 2XXX4XXX5XXX6XXX · 3 holders which blocks → FRACTEL, LLC 965H GLENDALE NV
2020-07-09 725-356 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H JEAN NV
2020-07-09 737-477 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H LOCKHART TX
2020-07-09 737-577 0XXX1XXX2XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H BRIGGS TX
2020-07-09 737-733 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H BASTROP TX

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.