Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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

8X8, INC. 43

NEW CINGULAR WIRELESS PCS, LLC - DC 26

Rogers Communications Canada Inc. (Wireless) 23

NEW CINGULAR WIRELESS PCS, LLC - IL 22

ONVOY, LLC - CA 21

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
—	646-966	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	NWYRCYZN01	NY
—	646-976	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	NY
—	646-977	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NY	6622	NWYRCYZN01	NY
—	646-981	3XXX5XXX6XXX7XXX8XXX · 2 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY	7133	NWYRCYZN01	NY
—	646-982	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC- NY	384C	NWYRCYZN01	NY
—	646-985	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	NWYRCYZN01	NY
—	646-999	not yet reported which blocks →			NWYRCYZN01	NY
—	650-200	0XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	TWILIO INTERNATIONAL, INC.	506J	SAN MATEO	CA
—	650-201	0XXX2XXX · 2 holders which blocks →	T-MOBILE USA, INC.	6529	SSNFRNCSCO	CA
—	650-202	0XXX1XXX2XXX3XXX4XXX5XXX6XXX which blocks →	UTILITY TELECOM GROUP, LLC - CA	9262	SAN MATEO	CA
—	650-204	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	MILLBRAE	CA
—	650-205	not yet reported which blocks →	SPOK, INC.	6630	SSNFRNCSCO	CA
—	650-206	0–9 XXXall 10 · 6 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	WOODSIDE	CA
—	650-207	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	REDWOOD CY	CA
—	650-208	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	REDWOOD CY	CA
—	650-209	0XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	LOS ALTOS	CA
—	650-210	4XXX6XXX7XXX · 3 holders which blocks →	PACIFIC BELL	9740	MT VIEW	CA
—	650-211	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	CA
—	650-212	5XXX6XXX · 2 holders which blocks →	PACIFIC BELL	9740	SAN MATEO	CA
—	650-213	2XXX6XXX7XXX · 3 holders which blocks →	PACIFIC BELL	9740	PALO ALTO	CA
—	650-215	0XXX1XXX3XXX7XXX8XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	MT VIEW	CA
—	650-216	5XXX7XXX8XXX · 3 holders which blocks →	PACIFIC BELL	9740	REDWOOD CY	CA
—	650-217	not yet reported which blocks →	SPOK, INC.	6630	SAN MATEO	CA
—	650-218	none assigned yet which blocks →	T-MOBILE USA, INC.	6529	SAN MATEO	CA
—	650-219	none assigned yet which blocks →	T-MOBILE USA, INC.	6529	SSNFRNCSCO	CA
—	650-222	none assigned yet which blocks →	T-MOBILE USA, INC.	6529	SAN MATEO	CA
—	650-223	1XXX3XXX4XXX5XXX9XXX · 4 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	PALO ALTO	CA
—	650-224	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	MT VIEW	CA
—	650-225	not yet reported which blocks →	PACIFIC BELL	9740	SSNFRNCSCO	CA
—	650-226	3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA	7240	SNCRL-BLMT	CA
—	650-227	3XXX4XXX9XXX · 2 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	SAN MATEO	CA
—	650-228	3XXX4XXX6XXX8XXX9XXX · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	SSNFRNCSCO	CA
—	650-229	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	LOS ALTOS	CA
—	650-230	not yet reported which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	MT VIEW	CA
—	650-231	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	MILLBRAE	CA
—	650-232	7XXX9XXX · 2 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	SNCRL-BLMT	CA
—	650-233	not yet reported which blocks →	PACIFIC BELL	9740	PALO ALTO	CA
—	650-234	not yet reported which blocks →	PACIFIC BELL	9740	PALO ALTO	CA
—	650-235	0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	SAN MATEO	CA
—	650-236	not yet reported which blocks →	PACIFIC BELL	9740	PALO ALTO	CA
—	650-237	9XXX which blocks →	PACIFIC BELL	9740	MT VIEW	CA
—	650-238	4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA	7240	SSNFRNCSCO	CA
—	650-239	2XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLC - CA	649C	MILLBRAE	CA
—	650-240	5XXX6XXX7XXX9XXX · 3 holders which blocks →	ONVOY, LLC - CA	649C	SAN MATEO	CA
—	650-241	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	REDWOOD CY	CA
—	650-242	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	SAN MATEO	CA
—	650-243	0XXX1XXX7XXX8XXX · 3 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	SSNFRNCSCO	CA
—	650-244	not yet reported which blocks →	PACIFIC BELL	9740	SSNFRNCSCO	CA
—	650-245	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SAN MATEO	CA
—	650-246	0XXX9XXX which blocks →	PACIFIC BELL	9740	SSNFRNCSCO	CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.