NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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, all time — NPA 279
FRACTEL, LLC 36
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
2022-05-24 279-688 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H ISLETON CA
2022-05-24 279-966 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H LINCOLN CA
2022-02-18 279-789 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SCRM MAIN CA
2021-12-09 279-277 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H RSVL CTHT CA
2021-09-15 279-977 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H RSVL MAIN CA
2021-07-16 279-766 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MEADOWVIEW CA
2021-07-07 279-322 1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H WALNUT GRV CA
2021-07-07 279-499 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H SCRM NORTH CA
2021-07-07 279-599 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H SCRM MAIN CA
2021-07-07 279-899 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H COURTLAND CA
2021-06-17 279-587 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H PLEASATGRV CA
2021-05-19 279-247 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H SCRM NORTH CA
2021-05-18 279-386 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H SCRM MAIN CA
2021-04-19 279-699 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H RIO LINDA CA
2021-02-25 279-732 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H FOLSOM CA
2021-02-04 279-758 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SCRM NORTH CA
2021-01-04 279-667 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H SCRM NORTH CA
2020-12-04 279-799 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H WALNUT GRV CA
2020-11-03 279-336 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H RSVL MAIN CA
2020-11-03 279-842 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H FOLSOM CA
2020-09-17 279-346 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H SCRM NORTH CA
2020-09-17 279-348 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H SCRM MAIN CA
2020-09-17 279-759 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H RIO LINDA CA
2020-09-17 279-946 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H MEADOWVIEW CA
2020-06-01 279-356 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H FOLSOM CA
2020-05-27 279-234 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SCRM MAIN CA
2020-05-27 279-345 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H SCRM NORTH CA
2020-03-25 279-465 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H FOLSOM CA
2019-12-02 279-400 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H LINCOLN CA
2019-12-02 279-500 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H MICHIGNBAR CA
2019-12-02 279-529 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H RSVL CTHT CA
2019-12-02 279-600 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SCRM MAIN CA
2019-01-23 279-222 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H SCRM MAIN CA
2019-01-23 279-800 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H ELK GROVE CA
2019-01-23 279-900 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H RSVL MAIN CA
2019-01-22 279-666 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SCRM NORTH CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.