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 737
FRACTEL, LLC 26
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
2021-12-30 737-587 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H AUSTIN TX
2021-10-26 737-386 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H LAMPASAS TX
2021-05-10 737-288 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H AUSTIN TX
2021-05-10 737-688 0XXX1XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H COUPLAND TX
2021-04-14 737-788 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H BURNET TX
2021-03-02 737-799 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H GRANGER TX
2021-01-12 737-786 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H ELGIN TX
2020-11-27 737-899 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BASTROP TX
2020-11-27 737-977 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H AUSTIN TX
2020-09-03 737-842 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H PAIGE TX
2020-09-03 737-877 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BUDA TX
2020-09-03 737-946 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H ADAMSVILLE TX
2020-08-18 737-336 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H AUSTIN TX
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
2020-07-02 737-345 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H GRANGER TX
2020-07-02 737-732 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H ROCKDALE TX
2020-06-18 737-377 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H AUSTIN TX
2020-06-18 737-667 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H GEORGETOWN TX
2019-12-30 737-348 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H BASTROP TX
2019-05-21 737-356 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H GEORGETOWN TX
2019-05-21 737-373 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SAN MARCOS TX
2019-05-21 737-465 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H AUSTIN TX
2019-05-21 737-758 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H KEMPNER TX
2019-05-21 737-766 0–9 XXXall 10 · 8 holders which blocks → FRACTEL, LLC 965H LEANDER TX

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.