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 531

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE 23

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
2025-09-26	531-431	1XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	SUPERIOR	NE
2025-03-07	531-373	0XXX1XXX3XXX7XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	HEBRON	NE
2025-01-16	531-363	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	LINCOLN	NE
2024-06-11	531-369	0XXX1XXX2XXX3XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	SYRACUSE	NE
2024-05-20	531-367	0XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	RANDOLPH	NE
2024-03-06	531-364	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	GENEVA	NE
2024-02-07	531-358	0XXX1XXX2XXX4XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	LOUISVILLE	NE
2024-01-11	531-354	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	OMAHA	NE
2022-04-08	531-291	0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 8 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	CRETE	NE
2021-11-02	531-279	9XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	GENOA	NE
2021-04-08	531-262	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	OMAHA	NE
2020-10-26	531-250	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	OMAHA	NE
2020-03-24	531-242	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	OMAHA	NE
2020-02-13	531-240	0–9 XXXall 10 · 8 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	ASHLAND	NE
2019-02-14	531-321	0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	ADAMS	NE
2018-11-07	531-228	0XXX1XXX2XXX4XXX8XXX9XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	PLATTSMTH	NE
2018-03-05	531-389	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	OMAHA	NE
2017-04-07	531-259	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	BRISTOW	NE
2016-03-31	531-209	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	BLAIR	NE
2016-01-28	531-212	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	OAKLAND	NE
2015-11-10	531-205	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	OMAHA	NE
2015-08-12	531-203	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	OMAHA	NE
—	531-739	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	LINCOLN	NE

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.