NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 840
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
2022-02-23 840-587 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H S BERNDINO CA
2022-02-18 840-336 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H COLTON CA
2022-02-18 840-356 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H ARROWHEAD CA
2022-01-27 840-500 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BIGBEAR CY CA
2021-10-28 840-588 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H DIAMONDBAR CA
2021-10-28 840-677 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H ETIWANDA CA
2021-10-25 840-688 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H CRESTLINE CA
2021-07-16 840-699 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H ONTARIO CA
2021-07-16 840-788 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H FONTANA CA
2021-07-15 840-300 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H REDLANDS CA
2021-07-15 840-799 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H RIALTO CA
2021-07-15 840-877 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H MARSHALL CA
2021-07-15 840-899 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H HIGHLAND CA
2021-07-15 840-977 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CLAREMONT CA
2021-07-07 840-345 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H POMONA CA
2021-07-07 840-465 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H CHINO CA
2021-04-18 840-234 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H ARROWHEAD CA
2021-01-04 840-200 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H CHINO CA
2021-01-04 840-400 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H ONTARIO CA
2021-01-04 840-600 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H COLTON CA
2020-12-24 840-222 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H S BERNDINO CA
2020-12-24 840-333 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H POMONA CA
2020-12-24 840-444 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H ARROWHEAD CA
2020-12-24 840-666 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H FONTANA CA
2020-12-24 840-800 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H UPLAND CA
2020-12-24 840-900 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H RIALTO CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.