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
2016-01-20	365-301	not yet reported which blocks →	Distributel	082E	Freelton	—
2016-01-20	365-302	not yet reported which blocks →	Distributel	082E	Georgetown	—
2016-01-20	365-303	not yet reported which blocks →	Distributel	082E	Milton	—
2016-01-20	365-304	not yet reported which blocks →	Distributel	082E	Campbellville	—
2016-01-20	412-214	0–9 XXXall 10 · 8 holders which blocks →	WIDE VOICE, LLC - PA	218H	PTTSBGZON8	PA
2016-01-20	425-426	0–9 XXXall 10 · 5 holders which blocks →	WIDE VOICE, LLC - WA	707G	EVERETT	WA
2016-01-20	541-666	0–9 XXXall 10 · 6 holders which blocks →	T-MOBILE USA, INC.	6529	ALBANY	OR
2016-01-20	561-567	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - FL	937C	WPALMBEACH	FL
2016-01-20	626-727	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - CA	649C	COVINA	CA
2016-01-20	657-387	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - CA	649C	YORBALINDA	CA
2016-01-20	803-991	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - SC	548E	NO AUGUSTA	SC
2016-01-20	808-657	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	HILO	HI
2016-01-20	904-661	0–9 XXXall 10 · 8 holders which blocks →	ONVOY, LLC - FL	937C	JACKSONVL	FL
2016-01-20	909-318	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - CA	649C	BIGBEAR LK	CA
2016-01-20	913-249	0–9 XXXall 10 · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - KS	7593	KANSASCITY	KS
2016-01-20	954-939	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - FL	937C	FTLAUDERDL	FL
2016-01-20	956-715	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	PHARR	TX
2016-01-19	204-900	not yet reported which blocks →	Iristel Inc.	154E	Oakbank	—
2016-01-19	210-974	0–9 XXXall 10 · 3 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - TX	7138	SANANTONIO	TX
2016-01-19	210-982	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - TX	903C	SANANTONIO	TX
2016-01-19	352-661	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	WILDWOOD	FL
2016-01-19	352-805	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	LEESBURG	FL
2016-01-19	407-725	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	WINTERPARK	FL
2016-01-19	431-400	not yet reported which blocks →	Iristel Inc.	154E	Portage La Prairie	—
2016-01-19	506-499	not yet reported which blocks →	Iristel Inc.	154E	Bathurst	—
2016-01-19	561-631	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	WPALMBEACH	FL
2016-01-19	775-515	0–9 XXXall 10 · 7 holders which blocks →	T-MOBILE USA, INC.	6529	CARSONCITY	NV
2016-01-19	778-769	not yet reported which blocks →	Iristel Inc.	154E	Abbotsford	—
2016-01-19	786-910	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	MIAMI	FL
2016-01-18	331-716	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC	224C	WHEATON	IL
2016-01-18	331-717	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	OSWEGO	IL
2016-01-18	346-717	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	BAMMEL	TX
2016-01-18	469-820	0–9 XXXall 10 · 8 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - TX	7148	RED OAK	TX
2016-01-18	657-297	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - CA	649C	SILVERADO	CA
2016-01-18	682-715	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	GLENDALE	TX
2016-01-18	682-716	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	ARLINGTON	TX
2016-01-18	702-820	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NV	9145	LAS VEGAS	NV
2016-01-18	716-717	0–9 XXXall 10 · 4 holders which blocks →	WIDE VOICE, LLC - NY	705G	BUFFALO	NY
2016-01-18	737-717	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - TX	903C	AUSTIN	TX
2016-01-15	202-873	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - DC	850D	WSHNGTNZN1	DC
2016-01-15	206-413	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	SEATTLE	WA
2016-01-15	206-823	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	BAINBDG IS	WA
2016-01-15	253-260	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA	5812	TACOMA	WA
2016-01-15	267-534	0–9 XXXall 10 · 6 holders which blocks →	BUSINESS AUTOMATION TECHNOLOGIES INC - PA	761H	PHLDLPHZN1	PA
2016-01-15	267-680	0–9 XXXall 10 · 6 holders which blocks →	BARR TELL USA, INC. - PA	752H	QUAKERTOWN	PA
2016-01-15	267-890	0–9 XXXall 10 · 4 holders which blocks →	BARR TELL USA, INC. - PA	752H	HARLEYSVL	PA
2016-01-15	267-903	0–9 XXXall 10 · 4 holders which blocks →	BARR TELL USA, INC. - PA	752H	LANSDALE	PA
2016-01-15	315-201	0–9 XXXwhole prefix which blocks →	ONVOY, LLC- NY	384C	MACDOUGALL	NY
2016-01-15	337-607	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - LA	3232	SULPHUR	LA
2016-01-15	361-414	0–9 XXXall 10 · 5 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	C CHRISTI	TX

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.