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 346
FRACTEL, LLC 40
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
2022-02-01 346-822 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H HSTNSUBURB TX
2022-02-01 346-833 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H HOUSTON TX
2021-08-12 346-622 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H BAMMEL TX
2021-08-11 346-755 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H SUGAR LAND TX
2021-07-30 346-855 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H BAYTOWN TX
2021-07-26 346-744 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H HSTNSUBURB TX
2021-07-16 346-922 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H BROOKSHIRE TX
2021-07-16 346-933 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H RICHMNRNBG TX
2021-05-10 346-499 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H DEER PARK TX
2021-05-10 346-566 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H WESTFIELD TX
2021-05-10 346-588 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CYPRESS TX
2021-05-10 346-599 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H HOUSTON TX
2021-05-10 346-688 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H MANVEL TX
2021-05-10 346-699 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H HSTNSUBURB TX
2021-05-10 346-866 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H VLY LODGE TX
2021-05-10 346-966 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H PORTER TX
2021-01-12 346-789 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H CHANNELVW TX
2020-11-27 346-799 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H CLEVELAND TX
2020-11-25 346-788 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H LEAGUECITY TX
2020-11-17 346-455 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H HOUSTON TX
2020-08-19 346-433 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H HSTNSUBURB TX
2020-08-19 346-899 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H STAFFORD TX
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
2020-07-02 346-946 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H CYPRESS TX
2020-06-22 346-677 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BAYTOWN TX
2020-06-22 346-786 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H SPRING TX
2020-06-18 346-667 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H KATY TX
2019-09-20 346-977 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H BAYTOWN TX
2019-05-21 346-465 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H LANGHAMCRK TX
2019-05-21 346-529 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H HSTNSUBURB TX
2019-05-21 346-732 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H CYPRESS TX
2019-05-21 346-758 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H RICHMNRNBG TX
2019-05-21 346-766 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H HOUSTON TX
2019-05-21 346-842 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H HUMBLE TX
2019-05-21 346-877 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H DEER PARK TX
2019-05-21 346-988 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H CLEVELAND 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.