Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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
2015-03-24	807-378	not yet reported which blocks →	Bell Mobility	6574	Manitouwadge	—
2015-03-24	807-379	not yet reported which blocks →	Bell Mobility	6574	Hornepayne	—
2015-03-23	207-994	0–9 XXXall 10 · 7 holders which blocks →	COMCAST IP PHONE, LLC	318J	KITTERY	ME
2015-03-23	208-600	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - ID	689F	BOISE	ID
2015-03-23	216-465	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - OH	464C	CLEVELAND	OH
2015-03-23	302-600	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - DE	969E	WILMINGTON	DE
2015-03-23	302-800	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - DE	969E	NEW CASTLE	DE
2015-03-23	312-897	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	CHICGOZN01	IL
2015-03-23	339-888	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - MA	892D	LYNN	MA
2015-03-23	412-500	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - PA	547E	PTTSBGZON1	PA
2015-03-23	424-339	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - CA	649C	SAN PEDRO	CA
2015-03-23	440-462	0–9 XXXwhole prefix which blocks →	BANDWIDTH.COM CLEC, LLC - OH	001F	CLEVELAND	OH
2015-03-23	442-249	0–9 XXXall 10 · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	VTVL ADLN	CA
2015-03-23	515-444	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - IA	221F	DES MOINES	IA
2015-03-23	530-443	0–9 XXXall 10 · 6 holders which blocks →	COMCAST PHONE OF CALIFORNIA, LLC	394L	MARYSVILLE	CA
2015-03-23	539-888	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - OK	409F	TULSA	OK
2015-03-23	559-721	0–9 XXXall 10 · 5 holders which blocks →	AT&T ENTERPRISES, LLC	516C	FRESNO	CA
2015-03-23	579-740	not yet reported which blocks →	Comwave Networks	160G	Joliette	—
2015-03-23	581-530	not yet reported which blocks →	Comwave Networks	160G	Thetford Mines	—
2015-03-23	613-718	not yet reported which blocks →	Comwave Networks	160G	Smiths Falls	—
2015-03-23	629-222	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - TN	525E	SMYRNA	TN
2015-03-23	629-444	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - TN	525E	MURFREESBO	TN
2015-03-23	667-999	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - MD	876D	ELKRIDGE	MD
2015-03-23	705-901	not yet reported which blocks →	Comwave Networks	160G	Parry Sound	—
2015-03-23	786-613	0–9 XXXall 10 · 3 holders which blocks →	AT&T ENTERPRISES, LLC	516C	NORTH DADE	FL
2015-03-23	814-888	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - PA	547E	MCKEAN	PA
2015-03-23	816-400	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - MO	093F	KANSASCITY	MO
2015-03-23	856-800	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - NJ	637C	MULLICA HL	NJ
2015-03-23	856-900	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - NJ	637C	MOORESTOWN	NJ
2015-03-23	857-666	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - MA	892D	BROOKLINE	MA
2015-03-23	873-861	not yet reported which blocks →	Videotron Ltd.	8306	Rouyn-Noranda	—
2015-03-23	917-900	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC- NY	384C	NWYRCYZN01	NY
2015-03-20	209-422	0–9 XXXall 10 · 4 holders which blocks →	COMCAST PHONE OF CALIFORNIA, LLC	394L	MODESTO	CA
2015-03-20	213-262	0–9 XXXwhole prefix which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	LSAN DA 01	CA
2015-03-20	213-436	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	LSAN DA 10	CA
2015-03-20	236-594	not yet reported which blocks →	TELUS Mobility	8301	Duncan	—
2015-03-20	302-900	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - DE	969E	CAMDEN	DE
2015-03-20	337-900	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - LA	749E	SULPHUR	LA
2015-03-20	434-404	0–9 XXXall 10 · 6 holders which blocks →	COMCAST IP PHONE, LLC	318J	SO BOSTON	VA
2015-03-20	480-465	0–9 XXXall 10 · 2 holders which blocks →	PAETEC ITEL, LLC	829J	PHOENIX	AZ
2015-03-20	559-825	0–9 XXXwhole prefix which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	FRESNO	CA
2015-03-20	562-850	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - CA	649C	LONG BEACH	CA
2015-03-20	567-585	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - OH	464C	TOLEDO	OH
2015-03-20	586-266	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	MT CLEMENS	MI
2015-03-20	586-835	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	MT CLEMENS	MI
2015-03-20	586-985	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	MT CLEMENS	MI
2015-03-20	602-566	0–9 XXXall 10 · 5 holders which blocks →	PAETEC ITEL, LLC	829J	PHOENIX	AZ
2015-03-20	636-999	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MO	093F	PACIFIC	MO
2015-03-20	657-264	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SANTA ANA	CA
2015-03-20	657-265	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SANTA ANA	CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.