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 956

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
2001-07-10	956-228	not yet reported which blocks →	SOUTHWESTERN BELL	9533	HARLINGEN	TX
2001-06-25	956-229	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LAREDO	TX
2001-06-25	956-276	1XXX4XXX6XXX7XXX8XXX · 3 holders which blocks →	SOUTHWESTERN BELL	9533	SAN BENITO	TX
2001-06-18	956-437	8XXX which blocks →	STPCS JOINT VENTURE, LLC	4290	ROMA	TX
2001-05-24	956-398	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	4344	RAYMONDVL	TX
2001-05-24	956-573	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	4344	RIGRANDECY	TX
2001-05-24	956-610	not yet reported which blocks →	SOUTHWESTERN BELL	9533	HARLINGEN	TX
2001-05-22	956-227	none assigned yet which blocks →	STPCS JOINT VENTURE, LLC	4290	MCALLEN	TX
2001-05-11	956-561	4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	BROWNSVL	TX
2001-05-11	956-638	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	MCALLEN	TX
2001-05-11	956-929	7XXX8XXX9XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	EDINBURG	TX
2001-05-07	956-288	not yet reported which blocks →	SPOK, INC.	6630	EDINBURG	TX
2001-05-07	956-767	not yet reported which blocks →	SPOK, INC.	6630	HARLINGEN	TX
2001-05-07	956-768	not yet reported which blocks →	SPOK, INC.	6630	BROWNSVL	TX
2001-05-01	956-533	not yet reported which blocks →	STPCS JOINT VENTURE, LLC	4290	MCALLEN	TX
2001-05-01	956-534	not yet reported which blocks →	STPCS JOINT VENTURE, LLC	4290	MCALLEN	TX
2001-05-01	956-867	not yet reported which blocks →	STPCS JOINT VENTURE, LLC	4290	MCALLEN	TX
2001-04-12	956-239	6XXX7XXX8XXX9XXX · 3 holders which blocks →	STPCS JOINT VENTURE, LLC	4290	EDINBURG	TX
2001-03-16	956-489	5XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LAREDO	TX
2001-03-13	956-592	none assigned yet which blocks →	STPCS JOINT VENTURE, LLC	4290	BROWNSVL	TX
2001-03-09	956-623	not yet reported which blocks →	SPOK, INC.	6630	MCALLEN	TX
2001-03-09	956-698	9XXX which blocks →	SOUTHWESTERN BELL	9533	BROWNSVL	TX
2001-03-07	956-624	not yet reported which blocks →	STPCS JOINT VENTURE, LLC	4290	MCALLEN	TX
2001-03-02	956-639	not yet reported which blocks →	STPCS JOINT VENTURE, LLC	4290	BROWNSVL	TX
2001-03-01	956-523	1XXX9XXX · 2 holders which blocks →	SOUTHWESTERN BELL	9533	LAREDO	TX
2001-02-07	956-893	none assigned yet which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	HARLINGEN	TX
2001-02-02	956-536	not yet reported which blocks →	STPCS JOINT VENTURE, LLC	4290	HARLINGEN	TX
—	956-202	0XXX4XXX6XXX7XXX8XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HARLINGEN	TX
—	956-206	none assigned yet which blocks →	METROPCS, INC.	5562	LAREDO	TX
—	956-211	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	TX
—	956-221	5XXX7XXX8XXX9XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	MCALLEN	TX
—	956-225	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	STPCS JOINT VENTURE, LLC	4290	MCALLEN	TX
—	956-226	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	STPCS JOINT VENTURE, LLC	4290	HARLINGEN	TX
—	956-231	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	GRANDE COMMUNICATIONS NETWORKS, INC. - TX	7670	LAREDO	TX
—	956-233	0XXX2XXX7XXX · 2 holders which blocks →	SOUTHWESTERN BELL	9533	LOSFRESNOS	TX
—	956-236	2XXX3XXX5XXX6XXX7XXX8XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	LAREDO	TX
—	956-237	none assigned yet which blocks →	STPCS JOINT VENTURE, LLC	4290	LAREDO	TX
—	956-244	7XXX8XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HARLINGEN	TX
—	956-245	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HARLINGEN	TX
—	956-248	none assigned yet which blocks →	VALLEY TEL. COOP., INC.	2159	SANPERLITA	TX
—	956-251	none assigned yet which blocks →	STPCS JOINT VENTURE, LLC	4290	LAREDO	TX
—	956-253	not yet reported which blocks →	ONVOY, LLC - TX	903C	ZAPATA	TX
—	956-255	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	EDCOUCH	TX
—	956-262	not yet reported which blocks →	SOUTHWESTERN BELL	9533	EDCOUCH	TX
—	956-268	not yet reported which blocks →	SPOK, INC.	6630	MCALLEN	TX
—	956-278	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	MCALLEN	TX
—	956-279	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	EDINBURG	TX
—	956-281	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HARLINGEN	TX
—	956-283	4XXX5XXX6XXX · 2 holders which blocks →	SOUTHWESTERN BELL	9533	PHARR	TX
—	956-284	0–9 XXXall 10 · 6 holders which blocks →	STPCS JOINT VENTURE, LLC	4290	LAREDO	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.