Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Which carriers received which NPA-NXX prefixes, and where. A single prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are often split across different carriers — use the blocks link on any row (or the thousands-block view above) to see which carrier holds which block. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days

8X8, INC. 38

ONVOY, LLC - CA 31

NEW CINGULAR WIRELESS PCS, LLC - IL 28

NEW CINGULAR WIRELESS PCS, LLC - DC 26

ONVOY, LLC - NJ 18

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	Assignee	OCN	Rate center	State
—	734-490 blocks →				MI
—	734-493 pooled blocks →	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	TRENTON	MI
—	734-494 pooled blocks →	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	ROMULUS	MI
—	734-495 blocks →	MICHIGAN BELL TEL CO	9323	YPSILANTI	MI
—	734-497 pooled blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	MONROE	MI
—	734-498 pooled blocks →	FRONTIER MIDSTATES, INC. - MI	0681	GREGORY	MI
—	734-500 blocks →				MI
—	734-501 blocks →	TELNET WORLDWIDE, INC.	817J	DUNDEE	MI
—	734-502 blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	WAYNE	MI
—	734-503 blocks →	TELNET WORLDWIDE, INC.	817J	SALINE	MI
—	734-504 blocks →	AMERICAN MESSAGING SERVICES, LLC	9748	WAYNE	MI
—	734-506 pooled blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	CARLETON	MI
—	734-507 pooled blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	YPSILANTI	MI
—	734-508 pooled blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	MILAN	MI
—	734-509 blocks →	SPOK, INC.	6630	ANN ARBOR	MI
—	734-511 blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	MI
—	734-512 pooled blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7279	TRENTON	MI
—	734-513 blocks →	MICHIGAN BELL TEL CO	9323	LIVONIA	MI
—	734-516 blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	WAYNE	MI
—	734-517 blocks →				MI
—	734-518 pooled blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7279	LIVONIA	MI
—	734-520 blocks →	TELNET WORLDWIDE, INC.	817J	IDA	MI
—	734-521 pooled blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7279	LIVONIA	MI
—	734-522 blocks →	MICHIGAN BELL TEL CO	9323	LIVONIA	MI
—	734-523 blocks →	MICHIGAN BELL TEL CO	9323	LIVONIA	MI
—	734-524 pooled blocks →	MICHIGAN BELL TEL CO	9323	LIVONIA	MI
—	734-525 blocks →	MICHIGAN BELL TEL CO	9323	LIVONIA	MI
—	734-526 pooled blocks →	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	MILAN	MI
—	734-527 blocks →	TELNET WORLDWIDE, INC.	817J	ANN ARBOR	MI
—	734-528 pooled blocks →	MICHIGAN BELL TEL CO	9323	YPSILANTI	MI
—	734-529 pooled blocks →	FRONTIER NORTH, INC. - MI	0695	DUNDEE	MI
—	734-530 pooled blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7279	WYANDOTTE	MI
—	734-531 pooled blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7279	ANN ARBOR	MI
—	734-532 pooled blocks →	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	ROMULUS	MI
—	734-533 blocks →	TELNET WORLDWIDE, INC.	817J	YPSILANTI	MI
—	734-534 blocks →	TELNET WORLDWIDE, INC.	817J	LAMBERTVL	MI
—	734-535 pooled blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7279	FLAT ROCK	MI
—	734-536 blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	LIVONIA	MI
—	734-538 blocks →	TELNET WORLDWIDE, INC.	817J	TEMPERANCE	MI
—	734-542 blocks →	MICHIGAN BELL TEL CO	9323	LIVONIA	MI
—	734-543 pooled blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7279	NEW BOSTON	MI
—	734-544 pooled blocks →	MICHIGAN BELL TEL CO	9323	YPSILANTI	MI
—	734-545 pooled blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ANN ARBOR	MI
—	734-546 blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ANN ARBOR	MI
—	734-547 pooled blocks →	MICHIGAN BELL TEL CO	9323	YPSILANTI	MI
—	734-548 pooled blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ANN ARBOR	MI
—	734-549 blocks →	TELNET WORLDWIDE, INC.	817J	ERIE	MI
—	734-551 pooled blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	NEW BOSTON	MI
—	734-552 blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	WYANDOTTE	MI
—	734-553 blocks →	TELNET WORLDWIDE, INC.	817J	GREGORY	MI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.