Recent prefix assignments

352 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 31

ONVOY, LLC - CA 27

NEW CINGULAR WIRELESS PCS, LLC - IL 27

ONVOY, LLC - NJ 15

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
—	274-611	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	WI
—	274-700	not yet reported which blocks →				WI
—	274-711	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	WI
—	274-811	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	WI
—	274-911	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	WI
—	274-950	not yet reported which blocks →				WI
—	274-958	not yet reported which blocks →				WI
—	274-959	not yet reported which blocks →				WI
—	274-976	not yet reported which blocks →				WI
—	276-201	0–9 XXXall 10 · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	MARTINSVL	VA
—	276-211	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	VA
—	276-218	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	EAST KENTUCKY NETWRK, LLC DBA APPALACHIAN WIRELESS	6940	HAYSI	VA
—	276-219	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	NORTON	VA
—	276-223	none assigned yet which blocks →	UNITED TELEPHONE-SOUTHEAST-VA DBA CENTURYLINK-VA	4511	WYTHEVILLE	VA
—	276-225	3XXX5XXX6XXX · 2 holders which blocks →	UNITED TELEPHONE-SOUTHEAST-VA DBA CENTURYLINK-VA	4511	MORRISONCY	VA
—	276-228	not yet reported which blocks →	UNITED TELEPHONE-SOUTHEAST-VA DBA CENTURYLINK-VA	4511	WYTHEVILLE	VA
—	276-233	none assigned yet which blocks →	UNITED STATES CELLULAR - VA	6283	GALAX	VA
—	276-235	6XXX7XXX9XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	GALAX	VA
—	276-236	not yet reported which blocks →	UNITED TELEPHONE-SOUTHEAST-VA DBA CENTURYLINK-VA	4511	GALAX	VA
—	276-237	0XXX1XXX2XXX3XXX4XXX5XXX6XXX which blocks →	UNITED STATES CELLULAR - VA	6283	GALAX	VA
—	276-238	none assigned yet which blocks →	UNITED TELEPHONE-SOUTHEAST-VA DBA CENTURYLINK-VA	4511	GALAX	VA
—	276-239	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	WYTHEVILLE	VA
—	276-243	0XXX1XXX2XXX4XXX6XXX7XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	MARION	VA
—	276-244	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	EAST KENTUCKY NETWRK, LLC DBA APPALACHIAN WIRELESS	6940	GRUNDY	VA
—	276-247	0XXX1XXX2XXX3XXX8XXX9XXX · 3 holders which blocks →	TELNYX LLC	073H	MARION	VA
—	276-251	4XXX6XXX · 2 holders which blocks →	BRIGHTSPEED OF VIRGINIA, LLC	0254	ARARAT	VA
—	276-252	0XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	MARTINSVL	VA
—	276-259	0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 2 holders which blocks →	VERIZON SOUTH, INC. - VA	4337	DWIGHT	VA
—	276-262	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	SALTVILLE	VA
—	276-263	0XXX1XXX2XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	CANA	VA
—	276-269	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	ABINGDON	VA
—	276-274	1XXX4XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	ABINGDON	VA
—	276-275	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	NORTON	VA
—	276-285	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	BRISTOL	VA
—	276-290	0–9 XXXall 10 · 4 holders which blocks →	TWILIO INTERNATIONAL, INC.	506J	HAYSI	VA
—	276-311	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	VA
—	276-321	0XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	VERIZON VIRGINIA, INC.	9213	WISE	VA
—	276-322	0XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	VERIZON SOUTH, INC. - VA	4337	BLUEFIELD	VA
—	276-325	0–9 XXXall 10 · 8 holders which blocks →	COMCAST IP PHONE, LLC	318J	NORTON	VA
—	276-326	0XXX5XXX7XXX8XXX9XXX · 3 holders which blocks →	VERIZON SOUTH, INC. - VA	4337	BLUEFIELD	VA
—	276-328	not yet reported which blocks →	VERIZON VIRGINIA, INC.	9213	WISE	VA
—	276-337	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	NORTON	VA
—	276-340	none assigned yet which blocks →	UNITED STATES CELLULAR - VA	6283	COLLINSVL	VA
—	276-345	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - VA	138E	RICHLANDS	VA
—	276-346	5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	VERIZON VIRGINIA, INC.	9213	JONESVILLE	VA
—	276-352	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 8 holders which blocks →	UNITED STATES CELLULAR - VA	6283	COLLINSVL	VA
—	276-356	0XXX which blocks →	SUNCOM DBA T-MOBILE USA	8645	ABINGDON	VA
—	276-358	4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks →	UNITED STATES CELLULAR - VA	6283	COLLINSVL	VA
—	276-365	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	NORTON	VA
—	276-376	5XXX which blocks →	VERIZON VIRGINIA, INC.	9213	WISE	VA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.