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 515
FRACTEL, LLC 13
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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-01-21 515-667 0XXX2XXX3XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H GOWRIE IA
2020-09-03 515-842 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H VAN METER IA
2020-07-21 515-786 2XXX3XXX5XXX7XXX · 2 holders which blocks → FRACTEL, LLC 965H OTHO IA
2020-07-21 515-944 4XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H WEST BEND IA
2020-04-27 515-877 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FRACTEL, LLC 965H POLK CITY IA
2020-04-27 515-946 0XXX3XXX4XXX5XXX7XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H ELKHART IA
2019-12-27 515-355 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H WILLIAMS IA
2019-12-27 515-529 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H COLFAX IA
2019-12-27 515-600 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H LUVERNE IA
2019-12-27 515-666 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H DES MOINES IA
2019-12-27 515-755 0XXX1XXX4XXX5XXX7XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H WESLEY IA
2019-12-27 515-900 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H BOONE IA
2019-12-23 515-766 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H AMES IA

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.