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
2020-03-26	631-984	0–9 XXXall 10 · 5 holders which blocks →	CSC WIRELESS, LLC	425J	DEER PARK	NY
2020-03-26	639-449	not yet reported which blocks →	Iristel Inc.	154E	Watrous	—
2020-03-26	650-531	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	PALO ALTO	CA
2020-03-26	786-761	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	MIAMI	FL
2020-03-26	813-590	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	TAMPASTH	FL
2020-03-26	878-678	0–9 XXXall 10 · 4 holders which blocks →	CORE COMMUNICATIONS, INC. - PA	3806	BADEN	PA
2020-03-26	949-578	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SADLBK VLY	CA
2020-03-26	972-209	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	GRANDPRARI	TX
2020-03-25	202-941	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC	6402	WSHNGTNZN1	DC
2020-03-25	202-963	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - DC	074F	WSHNGTNZN1	DC
2020-03-25	213-469	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	LSAN DA 04	CA
2020-03-25	213-566	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	LSAN DA 11	CA
2020-03-25	213-755	0–9 XXXall 10 · 6 holders which blocks →	FRACTEL, LLC	965H	LSAN DA 08	CA
2020-03-25	279-465	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	FOLSOM	CA
2020-03-25	413-368	0–9 XXXall 10 · 3 holders which blocks →	INTRADO COMMUNICATIONS, LLC	116E	SPRINGFLD	MA
2020-03-25	559-509	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	TULARE	CA
2020-03-25	612-447	0–9 XXXall 10 · 3 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	TWINCITIES	MN
2020-03-25	612-450	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	TWINCITIES	MN
2020-03-25	612-453	0–9 XXXall 10 · 2 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	TWINCITIES	MN
2020-03-25	618-330	0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - IL	984E	KAMPSVILLE	IL
2020-03-25	618-348	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - IL	984E	HERRICK	IL
2020-03-25	618-350	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - IL	984E	MARINE	IL
2020-03-25	618-358	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 8 holders which blocks →	BANDWIDTH.COM CLEC, LLC - IL	984E	NEW BADEN	IL
2020-03-25	651-378	0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	TWINCITIES	MN
2020-03-25	720-716	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CO	6118	DENVER	CO
2020-03-25	747-345	0–9 XXXall 10 · 6 holders which blocks →	FRACTEL, LLC	965H	SNFN PACM	CA
2020-03-25	763-327	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	TWINCITIES	MN
2020-03-25	763-328	0–9 XXXall 10 · 4 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	TWINCITIES	MN
2020-03-25	928-270	0–9 XXXall 10 · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - AZ	7217	SPRINGERVL	AZ
2020-03-25	952-245	0–9 XXXall 10 · 2 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	TWINCITIES	MN
2020-03-25	952-246	0–9 XXXall 10 · 5 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	TWINCITIES	MN
2020-03-24	208-992	0–9 XXXall 10 · 4 holders which blocks →	INTRADO COMMUNICATIONS, LLC	815C	BOISE	ID
2020-03-24	332-227	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	NWYRCYZN01	NY
2020-03-24	385-341	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	SALT LAKE	UT
2020-03-24	437-624	not yet reported which blocks →	Bell Mobility	6574	Toronto	—
2020-03-24	438-458	not yet reported which blocks →	Bell Mobility	6574	Montreal	—
2020-03-24	438-471	not yet reported which blocks →	Bell Mobility	6574	Montreal	—
2020-03-24	479-383	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	VAN BUREN	AR
2020-03-24	501-394	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	CABOT	AR
2020-03-24	531-242	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	OMAHA	NE
2020-03-24	618-280	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - IL	984E	ADDIEVILLE	IL
2020-03-24	720-694	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	DENVER	CO
2020-03-24	720-812	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO	6567	DENVER	CO
2020-03-24	725-229	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NV	4805	LAS VEGAS	NV
2020-03-24	725-230	0–9 XXXall 10 · 2 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NV	9145	LAS VEGAS	NV
2020-03-24	786-305	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	MIAMI	FL
2020-03-24	857-359	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	QUINCY	MA
2020-03-24	980-433	0–9 XXXall 10 · 2 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC	7835	CHARLOTTE	NC
2020-03-23	225-446	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	ALBANY	LA
2020-03-23	239-399	0–9 XXXall 10 · 5 holders which blocks →	FRACTEL, LLC	965H	NAPLES	FL

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.