Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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 575

E.N.M.R. TEL COOP 24

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

Recent NPA-NXX prefix assignments
Assigned	NPA-NXX	Thousands-blocks taken (last-4 opening)	Code holder	OCN	Rate center	State
—	575-279	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	HOUSE	NM
—	575-355	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	FORTSUMNER	NM
—	575-357	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	GRADY	NM
—	575-372	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	WEBER CITY	NM
—	575-374	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	CLAYTON	NM
—	575-389	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	PLEASANTHL	NM
—	575-421	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	EL VALLE	NM
—	575-422	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	WHITELAKES	NM
—	575-423	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	BINGHAM	NM
—	575-427	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	ANTONCHICO	NM
—	575-456	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	BELLVIEW	NM
—	575-458	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	RAGLAND	NM
—	575-472	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	SANTA ROSA	NM
—	575-485	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	ROY	NM
—	575-487	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	LOGAN	NM
—	575-576	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	SAN JON	NM
—	575-584	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	VAUGHN	NM
—	575-633	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	NARA VISA	NM
—	575-641	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	TREMENTINA	NM
—	575-673	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	MOSQUERO	NM
—	575-683	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	SO CLOVIS	NM
—	575-849	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	CORONA	NM
—	575-868	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	CONCHASDAM	NM
—	575-985	not yet reported which blocks →	E.N.M.R. TEL COOP	2262	RANCHVALE	NM

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.