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
2014-06-27	208-990	0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	GRAND VIEW	ID
2014-06-27	248-480	0–9 XXXall 10 · 4 holders which blocks →	COMCAST IP PHONE, LLC	318J	BIRMINGHAM	MI
2014-06-27	289-510	not yet reported which blocks →	Distributel	082E	Thornhill	—
2014-06-27	414-930	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WI	5489	MILWAUKZN1	WI
2014-06-27	425-229	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	BELLEVUE	WA
2014-06-27	437-344	not yet reported which blocks →	TELUS Mobility	8303	Toronto	—
2014-06-27	442-253	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	CALIPATRIA	CA
2014-06-27	469-292	0–9 XXXwhole prefix which blocks →	SOUTHWESTERN BELL TELEPHONE COMPANY - TX	7726	PLANO	TX
2014-06-27	574-404	0–9 XXXall 10 · 6 holders which blocks →	PAETEC ITEL, LLC	829J	SOUTH BEND	IN
2014-06-27	608-960	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MADISON	WI
2014-06-27	639-840	not yet reported which blocks →	SaskTel Mobility	9868	Lloydminster	—
2014-06-27	720-410	0–9 XXXall 10 · 4 holders which blocks →	COMCAST IP PHONE, LLC	318J	DENVER	CO
2014-06-27	850-818	0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 4 holders which blocks →	WOW! INTERNET, CABLE AND PHONE	961J	PANAMACITY	FL
2014-06-27	850-909	0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	WOW! INTERNET, CABLE AND PHONE	961J	SEAGRV BCH	FL
2014-06-27	873-392	not yet reported which blocks →	TELUS Quebec	2243	Coaticook	—
2014-06-27	929-292	0–9 XXXall 10 · 5 holders which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	NWYRCYZN07	NY
2014-06-27	956-652	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	LAREDO	TX
2014-06-26	360-947	0–9 XXXall 10 · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	VANCOUVER	WA
2014-06-26	385-405	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	OGDEN	UT
2014-06-26	475-215	0–9 XXXall 10 · 6 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	RIDGEFIELD	CT
2014-06-26	559-598	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	MADERA	CA
2014-06-26	586-288	2XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	MT CLEMENS	MI
2014-06-26	586-475	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	MT CLEMENS	MI
2014-06-26	607-385	0–9 XXXall 10 · 10 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	HORNELL	NY
2014-06-26	618-481	0–9 XXXall 10 · 6 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	BRIGHTON	IL
2014-06-26	646-846	0–9 XXXwhole prefix which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	NWYRCYZN01	NY
2014-06-26	860-650	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CT	199F	PAWCATUCK	CT
2014-06-26	929-285	0–9 XXXall 10 · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY	7133	NWYRCYZN03	NY
2014-06-25	469-729	0–9 XXXall 10 · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	DALLAS	TX
2014-06-25	470-439	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	ADAIRSVL	GA
2014-06-25	470-839	0–9 XXXall 10 · 5 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	CUMMING	GA
2014-06-25	541-809	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - OR	750E	MILTONFWTR	OR
2014-06-25	734-304	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7279	TRENTON	MI
2014-06-24	402-406	0XXX1XXX2XXX3XXX4XXX7XXX8XXX · 4 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	FRIEND	NE
2014-06-24	402-701	0XXX2XXX4XXX5XXX6XXX7XXX · 3 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	DENTON	NE
2014-06-24	402-703	0–9 XXXall 10 · 6 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	GENEVA	NE
2014-06-24	402-901	0XXX1XXX4XXX5XXX6XXX7XXX · 4 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	GREENWOOD	NE
2014-06-24	424-610	0–9 XXXall 10 · 7 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA	7240	SNMN SNMN	CA
2014-06-24	442-243	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	VICTORVL	CA
2014-06-24	520-359	0–9 XXXall 10 · 7 holders which blocks →	METROPCS, INC.	5562	TUCSON	AZ
2014-06-24	620-461	0XXX1XXX · 2 holders which blocks →	FIBER COMMUNICATIONS OF COLUMBUS LLC - KS	342H	GALENA	KS
2014-06-24	661-483	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	LANCASTER	CA
2014-06-24	807-371	not yet reported which blocks →	Bell Mobility	6574	Marathon	—
2014-06-24	807-372	not yet reported which blocks →	Bell Mobility	6574	Nipigon	—
2014-06-24	807-373	not yet reported which blocks →	Bell Mobility	6574	Schreiber	—
2014-06-24	807-374	not yet reported which blocks →	Bell Mobility	6574	Sioux Lookout	—
2014-06-24	807-375	not yet reported which blocks →	Bell Mobility	6574	Terrace Bay	—
2014-06-24	939-229	0–9 XXXall 10 · 3 holders which blocks →	DATA@CCESS COMMUNICATION, INC. - PR	752E	SANTURCEES	PR
2014-06-23	226-277	not yet reported which blocks →	Comwave Networks	160G	Owen Sound	—
2014-06-23	415-942	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	SAUSALITO	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.