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 539
FRACTEL, LLC 22
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
2021-11-18 539-300 0XXX1XXX3XXX7XXX · 4 holders which blocks → FRACTEL, LLC 965H WESTVILLE OK
2021-08-04 539-386 0XXX3XXX4XXX6XXX7XXX · 4 holders which blocks → FRACTEL, LLC 965H RIPLEY OK
2021-08-04 539-432 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H BRISTOW OK
2021-08-04 539-567 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H SAPULPA OK
2021-08-04 539-667 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H OKMULGEE OK
2021-08-04 539-758 0XXX1XXX3XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H DEPEW OK
2021-08-04 539-789 0XXX6XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H FORTGIBSON OK
2021-08-04 539-842 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H JENKS OK
2020-09-09 539-247 7XXX which blocks → FRACTEL, LLC 965H SHIDLER OK
2020-09-09 539-346 2XXX which blocks → FRACTEL, LLC 965H DAVENPORT OK
2020-09-09 539-542 2XXX5XXX · 2 holders which blocks → FRACTEL, LLC 965H JENNINGS OK
2020-09-09 539-724 6XXX which blocks → FRACTEL, LLC 965H MANNFORD OK
2020-09-09 539-732 5XXX which blocks → FRACTEL, LLC 965H OCHELATA OK
2020-09-09 539-786 6XXX7XXX · 2 holders which blocks → FRACTEL, LLC 965H PRUE OK
2020-09-03 539-336 6XXX8XXX · 2 holders which blocks → FRACTEL, LLC 965H CEDARCREST OK
2020-09-03 539-356 7XXX9XXX which blocks → FRACTEL, LLC 965H HITCHITA OK
2020-09-03 539-465 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H AFTON OK
2020-09-03 539-946 3XXX which blocks → FRACTEL, LLC 965H FORAKER OK
2020-07-15 539-766 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H BROKENARRW OK
2020-07-14 539-529 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H BARTLESVL OK
2020-07-14 539-577 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H MIAMI OK
2020-07-01 539-348 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H SO CHETOPA OK

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.