Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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 19

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
2020-01-27	458-251	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - OR	750E	ONTARIO	OR
2020-01-27	469-784	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	DLFTWTARPT	TX
2020-01-27	585-480	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	MIDDLEPORT	NY
2020-01-27	647-507	not yet reported which blocks →	Videotron Ltd.	787G	Toronto	—
2020-01-27	657-421	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	HUNTITNBCH	CA
2020-01-27	667-276	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD	7228	BEL AIR	MD
2020-01-27	715-999	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - WI	225C	RICE LAKE	WI
2020-01-27	971-268	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	BEAVERTON	OR
2020-01-27	971-671	0XXX1XXX4XXX6XXX7XXX · 4 holders which blocks →	ONVOY, LLC - OR	750E	KNAPPA	OR
2020-01-24	202-949	0–9 XXXall 10 · 3 holders which blocks →	HD CARRIER LLC	321J	WSHNGTNZN1	DC
2020-01-24	217-618	0XXX1XXX2XXX3XXX4XXX6XXX · 3 holders which blocks →	ONVOY, LLC	224C	ARENZVILLE	IL
2020-01-24	254-369	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	KILLEEN	TX
2020-01-24	254-454	0XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks →	ONVOY, LLC - TX	903C	DUBLIN	TX
2020-01-24	262-900	0–9 XXXall 10 · 5 holders which blocks →	TERRA NOVA TELECOM INC.	145J	RACINE	WI
2020-01-24	307-400	0–9 XXXall 10 · 3 holders which blocks →	TERRA NOVA TELECOM INC.	145J	CHEYENNE	WY
2020-01-24	352-657	0–9 XXXall 10 · 4 holders which blocks →	TELNYX LLC	073H	OCALA	FL
2020-01-24	463-228	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IN	4803	FISHERS	IN
2020-01-24	469-768	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FRISCO	TX
2020-01-24	501-385	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HOTSPRINGS	AR
2020-01-24	585-514	0–9 XXXall 10 · 6 holders which blocks →	CSC WIRELESS, LLC	425J	ROCHESTER	NY
2020-01-24	608-866	0–9 XXXall 10 · 4 holders which blocks →	TERRA NOVA TELECOM INC.	145J	MADISON	WI
2020-01-24	680-218	0–9 XXXall 10 · 4 holders which blocks →	CSC WIRELESS, LLC	425J	SYRACUSE	NY
2020-01-24	716-303	0–9 XXXall 10 · 3 holders which blocks →	CSC WIRELESS, LLC	425J	BUFFALO	NY
2020-01-24	870-646	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	IMBODEN	AR
2020-01-24	873-535	not yet reported which blocks →	Videotron Ltd.	8306	Barraute	—
2020-01-24	873-536	not yet reported which blocks →	Videotron Ltd.	8306	Senneterre	—
2020-01-24	873-537	not yet reported which blocks →	Videotron Ltd.	8306	La Corne	—
2020-01-24	873-538	not yet reported which blocks →	Videotron Ltd.	8306	Taschereau	—
2020-01-24	878-877	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - PA	547E	BUTLER	PA
2020-01-23	332-224	0–9 XXXwhole prefix which blocks →	LTE WIRELESS INC D/B/A LTE WIRELESS - NY	452J	NWYRCYZN01	NY
2020-01-23	737-266	0–9 XXXall 10 · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	SAN MARCOS	TX
2020-01-23	873-534	not yet reported which blocks →	Videotron Ltd.	8306	Lebel-sur-Quevillon	—
2020-01-23	980-304	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NC	3235	NEW SALEM	NC
2020-01-22	326-888	0–9 XXXall 10 · 4 holders which blocks →	TERRA NOVA TELECOM INC.	145J	MECHANCSBG	OH
2020-01-22	579-759	not yet reported which blocks →	Iristel Inc.	154E	Sorel	—
2020-01-22	704-420	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC	6324	CHARLOTTE	NC
2020-01-22	806-706	8XXX9XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	VERBENA	TX
2020-01-22	850-804	0–9 XXXall 10 · 3 holders which blocks →	TELNYX LLC	073H	PANAMACITY	FL
2020-01-22	850-806	0–9 XXXall 10 · 2 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - FL	8300	PENSACOLA	FL
2020-01-21	365-615	not yet reported which blocks →	Iristel Inc.	154E	Thornhill	—
2020-01-21	365-625	not yet reported which blocks →	Iristel Inc.	154E	Thornhill	—
2020-01-21	386-278	0–9 XXXall 10 · 4 holders which blocks →	TELNYX LLC	073H	DAYTONABCH	FL
2020-01-21	479-378	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	GARFIELD	AR
2020-01-21	548-490	not yet reported which blocks →	Iristel Inc.	154E	Kitchener-Waterloo	—
2020-01-21	579-529	not yet reported which blocks →	Videotron Ltd.	8306	Valcourt	—
2020-01-21	605-303	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD	6569	WATERTOWN	SD
2020-01-21	629-237	0–9 XXXall 10 · 5 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - TN	114F	NASHVILLE	TN
2020-01-21	681-287	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	PRKRSBGZN1	WV
2020-01-21	717-981	0–9 XXXwhole prefix which blocks →	LEVEL 3 COMMUNICATIONS, LLC - PA	4007	HARISBGZN1	PA
2020-01-21	916-639	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SCRM MAIN	CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.