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
2021-05-19	517-557	5XXX7XXX9XXX · 3 holders which blocks →	ONVOY SPECTRUM, LLC	624H	BRITTON	MI
2021-05-19	586-366	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLCV - MI	543C	ARMADA	MI
2021-05-19	657-505	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	ANAHEIM	CA
2021-05-19	734-290	0–9 XXXall 10 · 2 holders which blocks →	ONVOY SPECTRUM, LLC	624H	DUNDEE	MI
2021-05-19	734-584	0XXX3XXX4XXX5XXX8XXX · 2 holders which blocks →	ONVOY SPECTRUM, LLC	624H	GREGORY	MI
2021-05-19	774-732	0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 5 holders which blocks →	FRACTEL, LLC	965H	FRAMINGHAM	MA
2021-05-19	774-786	0–9 XXXall 10 · 6 holders which blocks →	FRACTEL, LLC	965H	MANSFIELD	MA
2021-05-19	774-899	0XXX1XXX4XXX5XXX8XXX9XXX · 4 holders which blocks →	FRACTEL, LLC	965H	NOBROOKFLD	MA
2021-05-19	775-471	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	SWEETWATER	NV
2021-05-19	786-992	0–9 XXXall 10 · 2 holders which blocks →	SKYE TELECOM LLC DBA SKYETEL	622J	MIAMI	FL
2021-05-19	810-380	0–9 XXXall 10 · 4 holders which blocks →	ONVOY SPECTRUM, LLC	624H	FLUSHING	MI
2021-05-19	810-440	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	ONVOY, LLCV - MI	543C	CLIMTMORRS	MI
2021-05-19	825-406	not yet reported which blocks →	TELUS	8084	Medicine Hat	—
2021-05-19	825-439	not yet reported which blocks →	Videotron Ltd.	787G	Edmonton	—
2021-05-19	845-607	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NY	997E	SCOTCHTOWN	NY
2021-05-19	872-284	0–9 XXXall 10 · 3 holders which blocks →	HD CARRIER LLC	321J	CHICGOZN05	IL
2021-05-19	930-236	0XXX1XXX2XXX3XXX9XXX · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - IN	105F	LINTON	IN
2021-05-19	940-424	0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks →	TELNYX LLC	073H	VERNON	TX
2021-05-19	945-468	0–9 XXXall 10 · 6 holders which blocks →	SKYE TELECOM LLC DBA SKYETEL	622J	DALLAS	TX
2021-05-19	947-247	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLCV - MI	543C	HOLLY	MI
2021-05-19	986-209	0XXX1XXX3XXX6XXX8XXX9XXX · 2 holders which blocks →	T-MOBILE USA, INC.	6529	KETCHUM	ID
2021-05-19	989-407	0XXX4XXX7XXX · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - MI	991E	ASHLEY	MI
2021-05-18	279-386	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	SCRM MAIN	CA
2021-05-18	405-956	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	BETHANY	OK
2021-05-18	442-358	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	RAMONA	CA
2021-05-18	785-563	0XXX1XXX2XXX9XXX · 3 holders which blocks →	METROPCS, INC.	5562	VICTORIA	KS
2021-05-18	928-406	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	WINSLOW	AZ
2021-05-18	949-876	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - CA	649C	SADLBK VLY	CA
2021-05-18	949-990	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	SADLBK VLY	CA
2021-05-18	949-991	0–9 XXXall 10 · 5 holders which blocks →	FRACTEL, LLC	965H	NEWPORTBCH	CA
2021-05-18	949-992	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	IRVINE	CA
2021-05-18	949-993	0–9 XXXall 10 · 5 holders which blocks →	FRACTEL, LLC	965H	CAPITRNVLY	CA
2021-05-18	949-995	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	LAGUNA BCH	CA
2021-05-17	256-902	0XXX1XXX2XXX3XXX4XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL	6804	RUSSELLVL	AL
2021-05-17	423-688	0XXX8XXX9XXX · 3 holders which blocks →	TELNYX LLC	073H	SNEEDVILLE	TN
2021-05-17	430-283	0XXX1XXX2XXX3XXX4XXX · 4 holders which blocks →	TELNYX LLC	073H	ARP	TX
2021-05-17	447-207	0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - IL	7136	FITHIAN	IL
2021-05-17	448-888	1XXX6XXX7XXX8XXX · 4 holders which blocks →	TERRA NOVA TELECOM, INC. - FL	382G	SNEADS	FL
2021-05-17	463-355	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks →	ONVOY SPECTRUM, LLC	624H	FAIRLAND	IN
2021-05-17	580-391	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	CADDO	OK
2021-05-17	603-696	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - NH	637E	MANCHESTER	NH
2021-05-17	708-791	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LA GRANGE	IL
2021-05-17	774-758	6XXX7XXX8XXX9XXX · 3 holders which blocks →	FRACTEL, LLC	965H	BELLINGHAM	MA
2021-05-17	774-842	0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks →	FRACTEL, LLC	965H	BROCKTON	MA
2021-05-17	786-685	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	MIAMI	FL
2021-05-17	808-809	0–9 XXXall 10 · 3 holders which blocks →	ONVOY SPECTRUM, LLC	624H	HONOLULU	HI
2021-05-17	813-821	0–9 XXXwhole prefix which blocks →	MCI WORLDCOM COMMUNICATIONS, INC. - FL	7448	TAMPACEN	FL
2021-05-17	854-221	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC	6398	DILLON	SC
2021-05-17	857-372	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	QUINCY	MA
2021-05-17	915-455	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	EL PASO	TX

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.