Thousands-blocks in 308-280

This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The ten 1,000-number thousand-blocks inside prefix 308-280 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 308 blocks

Most active assignees, all time — NPA 308

UNITED STATES CELLULAR - NE 3

ONVOY, LLC - NE 3

TELEPORT COMMUNICATIONS AMERICA, LLC - NE 1

NEW CINGULAR WIRELESS PCS, LLC - IL 1

MCIMETRO ACCESS TRANSMISSION SERVICES LLC 1

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 thousands-block assignments
Assigned	Thousands-block	Last 4 digits	Status	Assignee	OCN	Rate center	State
—	308-280-0XXX	0000–0999	Reserved	UNITED STATES CELLULAR - NE	6263	OGALLALA	NE
—	308-280-1XXX	1000–1999	Reserved	UNITED STATES CELLULAR - NE	6263	OGALLALA	NE
2020-09-09	308-280-2XXX	2000–2999	Assigned	ONVOY, LLC - NE	549E	OGALLALA	NE
2020-06-12	308-280-3XXX	3000–3999	Assigned	ONVOY, LLC - NE	549E	OGALLALA	NE
2020-04-07	308-280-4XXX	4000–4999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	OGALLALA	NE
2014-06-16	308-280-5XXX	5000–5999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	OGALLALA	NE
2016-12-01	308-280-6XXX	6000–6999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - NE	7144	OGALLALA	NE
2014-12-02	308-280-7XXX	7000–7999	Assigned	CENTURYLINK COMMUNICATIONS, LLC	508J	OGALLALA	NE
2019-11-25	308-280-8XXX	8000–8999	Assigned	ONVOY, LLC - NE	549E	OGALLALA	NE
2018-04-30	308-280-9XXX	9000–9999	Assigned	UNITED STATES CELLULAR - NE	6263	OGALLALA	NE

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.