NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

371 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. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.

Most active assignees, last 30 days
8X8, INC. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 31
NEW CINGULAR WIRELESS PCS, LLC - DC 30
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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXAssigneeOCNRate centerState
219-394 NORTHWESTERN INDIANA TEL. CO., INC. 0800 MOUNT AYR IN
219-395 FRONTIER NORTH, INC.. - IN 0772 CHESTERTON IN
219-397 INDIANA BELL TEL CO INC 9325 E CHICAGO IN
219-398 INDIANA BELL TEL CO INC 9325 E CHICAGO IN
219-399 INDIANA BELL TEL CO INC 9325 E CHICAGO IN
219-405 METROPCS, INC. 5562 VALPARAISO IN
219-406 METROPCS, INC. 5562 PORTAGE IN
219-411 MULTIPLE OCN LISTING MULT XXXXXXXXXX IN
219-462 FRONTIER NORTH, INC.. - IN 0772 VALPARAISO IN
219-464 FRONTIER NORTH, INC.. - IN 0772 VALPARAISO IN
219-465 FRONTIER NORTH, INC.. - IN 0772 VALPARAISO IN
219-473 INDIANA BELL TEL CO INC 9325 WHITING IN
219-474 BRIGHTSPEED OF INDIANA, LLC 0832 KENTLAND IN
219-476 FRONTIER NORTH, INC.. - IN 0772 VALPARAISO IN
219-477 FRONTIER NORTH, INC.. - IN 0772 VALPARAISO IN
219-510 FBN INDIANA, INC. - IN 4117 VALPARAISO IN
219-511 MULTIPLE OCN LISTING MULT XXXXXXXXXX IN
219-512 T-MOBILE USA, INC. 6529 GARY IN
219-513 INDIANA BELL TEL CO INC 9325 HIGHLAND IN
219-531 FRONTIER NORTH, INC.. - IN 0772 VALPARAISO IN
219-544 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LA CROSSE IN
219-545 METROPCS, INC. 5562 GARY IN
219-548 FRONTIER NORTH, INC.. - IN 0772 VALPARAISO IN
219-552 INDIANA BELL TEL CO INC 9325 LOWELL IN
219-554 INDIANA BELL TEL CO INC 9325 HAMMOND IN
219-555 MULTIPLE OCN LISTING MULT DIR ASST IN
219-561 METROPCS, INC. 5562 MICHIGANCY IN
219-567 BRIGHTSPEED OF INDIANA, LLC 0832 FRANCESVL IN
219-575 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LA PORTE IN
219-576 FBN INDIANA, INC. - IN 4117 MERRILLVL IN
219-577 FBN INDIANA, INC. - IN 4117 CROWNPOINT IN
219-604 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 REYNOLDS IN
219-611 MULTIPLE OCN LISTING MULT XXXXXXXXXX IN
219-613 T-MOBILE USA, INC. 6529 CROWNPOINT IN
219-614 T-MOBILE USA, INC. 6529 GARY IN
219-616 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MERRILLVL IN
219-617 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PORTAGE IN
219-628 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PORTAGE IN
219-629 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HAMMOND IN
219-641 INDIANA BELL TEL CO INC 9325 MERRILLVL IN
219-644 INDIANA BELL TEL CO INC 9325 MERRILLVL IN
219-647 INDIANA BELL TEL CO INC 9325 MERRILLVL IN
219-648 INDIANA BELL TEL CO INC 9325 MERRILLVL IN
219-649 INDIANA BELL TEL CO INC 9325 MERRILLVL IN
219-650 INDIANA BELL TEL CO INC 9325 MERRILLVL IN
219-655 TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 WHITING IN
219-659 INDIANA BELL TEL CO INC 9325 WHITING IN
219-660 INDIANA BELL TEL CO INC 9325 MERRILLVL IN
219-661 INDIANA BELL TEL CO INC 9325 CROWNPOINT IN
219-662 INDIANA BELL TEL CO INC 9325 CROWNPOINT IN

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.