Recent prefix assignments

1 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, last 30 days — NPA 940

8X8, INC. 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 NPA-NXX prefix assignments
Assigned	NPA-NXX	Thousands-blocks taken (last-4 opening)	Code holder	OCN	Rate center	State
2001-09-14	940-531	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	BOWIE	TX
2001-09-13	940-532	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	GRAHAM	TX
2001-07-20	940-337	5XXX7XXX8XXX which blocks →	T-MOBILE USA, INC.	6529	WICHITAFLS	TX
2001-05-29	940-539	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	DECATUR	TX
2001-05-22	940-818	1XXX2XXX3XXX8XXX · 2 holders which blocks →	BRIGHTSPEED OF EASTERN TEXAS, INC.	2084	JOPLIN	TX
2001-05-17	940-584	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	4344	BARTONVL	TX
2001-04-04	940-657	not yet reported which blocks →	SANTA ROSA TELEPHONE COOPERATIVE, INC.	4046	KNOX CITY	TX
2001-03-09	940-722	not yet reported which blocks →	SPOK, INC.	6630	DENTON	TX
2001-03-07	940-641	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	GAINESVL	TX
2001-02-12	940-562	none assigned yet which blocks →	SANTA ROSA TELEPHONE COOPERATIVE, INC.	4046	MEGARGEL	TX
—	940-201	not yet reported which blocks →	SOUTHWESTERN BELL	9533	XXXXXXXXXX	TX
—	940-206	2XXX which blocks →	METROPCS, INC.	5562	DENTON	TX
—	940-211	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	TX
—	940-220	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	DENTON	TX
—	940-224	none assigned yet which blocks →	T-MOBILE USA, INC.	6529	WICHITAFLS	TX
—	940-230	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	DENTON	TX
—	940-231	2XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	DENTON	TX
—	940-235	0XXX2XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	SOUTHWESTERN BELL	9533	WICHITAFLS	TX
—	940-237	not yet reported which blocks →	CHOICE WIRELESS, LC	3533	WICHITAFLS	TX
—	940-239	1XXX2XXX3XXX4XXX8XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	DENTON	TX
—	940-240	2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	4344	ARGYLE	TX
—	940-241	0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	4344	BARTONVL	TX
—	940-242	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	4344	JUSTIN	TX
—	940-243	not yet reported which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	4344	DENTON	TX
—	940-245	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	DECATUR	TX
—	940-246	not yet reported which blocks →	GRANDE COMMUNICATIONS NETWORKS, INC. - TX	7670	ARGYLE	TX
—	940-256	5XXX6XXX7XXX9XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	SEYMOUR	TX
—	940-257	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	SOUTHWESTERN BELL	9533	WICHITAFLS	TX
—	940-262	not yet reported which blocks →	GRANDE COMMUNICATIONS NETWORKS, INC. - TX	7670	ARGYLE	TX
—	940-264	not yet reported which blocks →	WEB FIRE COMMUNICATIONS, INC. - TX	2985	WICHITAFLS	TX
—	940-265	not yet reported which blocks →	GRANDE COMMUNICATIONS NETWORKS, INC. - TX	7670	AUBREY	TX
—	940-266	not yet reported which blocks →	GRANDE COMMUNICATIONS NETWORKS, INC. - TX	7670	AUBREY	TX
—	940-269	not yet reported which blocks →	GRANDE COMMUNICATIONS NETWORKS, INC. - TX	7670	LAKEDALLAS	TX
—	940-270	not yet reported which blocks →	GRANDE COMMUNICATIONS NETWORKS, INC. - TX	7670	LAKEDALLAS	TX
—	940-271	not yet reported which blocks →	GRANDE COMMUNICATIONS NETWORKS, INC. - TX	7670	DENTON	TX
—	940-272	not yet reported which blocks →	GRANDE COMMUNICATIONS NETWORKS, INC. - TX	7670	DENTON	TX
—	940-280	0–9 XXXall 10 · 7 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	WICHITAFLS	TX
—	940-293	2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	DENTON	TX
—	940-294	0XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	ARGYLE	TX
—	940-295	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	BARTONVL	TX
—	940-297	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	4344	DENTON	TX
—	940-300	2XXX which blocks →	METROPCS, INC.	5562	DENTON	TX
—	940-305	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	AUBREY	TX
—	940-311	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	TX
—	940-320	9XXX which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	4344	DENTON	TX
—	940-321	not yet reported which blocks →	BRIGHTSPEED OF NORTHERN TEXAS, INC.	2101	LAKEDALLAS	TX
—	940-322	not yet reported which blocks →	SOUTHWESTERN BELL	9533	WICHITAFLS	TX
—	940-323	not yet reported which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	4344	DENTON	TX
—	940-324	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	PILOTPOINT	TX
—	940-325	not yet reported which blocks →	SOUTHWESTERN BELL	9533	MINERLWLLS	TX

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.