NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

1 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)

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 — NPA 317
OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 1
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-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2012-09-25 317-646 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2012-09-13 317-719 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2012-08-23 317-619 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2012-05-10 317-880 0–9 XXXwhole prefix which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
2012-01-30 317-601 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2012-01-30 317-617 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2012-01-23 317-515 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2012-01-09 317-540 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2012-01-09 317-551 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2011-11-14 317-434 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CUMBERLAND IN
2011-10-10 317-315 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 GREENFIELD IN
2011-09-15 317-478 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2011-08-17 317-350 0–9 XXXall 10 · 9 holders which blocks → COMCAST IP PHONE, LLC 318J BROWNSBURG IN
2011-07-21 317-476 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2011-06-10 317-296 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2011-05-10 317-643 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F INDIANAPLS IN
2011-04-04 317-678 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F NOBLESVL IN
2011-03-17 317-378 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J INDIANAPLS IN
2011-02-23 317-628 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2011-02-23 317-629 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2011-01-13 317-900 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NOBLESVL IN
2010-12-22 317-600 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2010-12-22 317-800 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2010-12-20 317-438 0–9 XXXall 10 · 2 holders which blocks → AT&T ENTERPRISES, LLC 516C INDIANAPLS IN
2010-11-26 317-400 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2010-11-26 317-500 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2010-10-21 317-647 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C SHERIDAN IN
2010-09-27 317-597 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F OAKLANDON IN
2010-09-17 317-550 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F INDIANAPLS IN
2010-07-27 317-528 0–9 XXXall 10 · 2 holders which blocks → INDIANA BELL TEL CO INC 9325 GREENWOOD IN
2010-07-14 317-384 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2010-07-14 317-397 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2010-07-14 317-667 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2010-07-12 317-220 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2010-06-11 317-447 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2010-06-03 317-559 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF INDIANA, LLC - IN 279F INDIANAPLS IN
2010-04-29 317-212 0–9 XXXwhole prefix which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
2010-03-29 317-759 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - IN 097D INDIANAPLS IN
2010-03-09 317-775 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2009-12-18 317-593 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 ACTON IN
2009-11-04 317-721 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F INDIANAPLS IN
2009-08-11 317-480 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FAIRLAND IN
2009-07-21 317-369 0XXX7XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J MAXWELL IN
2009-06-11 317-494 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 FRANKLIN IN
2009-05-27 317-944 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2009-05-27 317-948 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2009-04-06 317-768 0–9 XXXall 10 · 7 holders which blocks → COMMUNICATIONS CORP. OF INDIANA 0776 WHITESTOWN IN
2009-03-11 317-771 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2008-09-09 317-495 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2008-08-26 317-426 0–9 XXXall 10 · 2 holders which blocks → BHN IP ENABLED SERVICES, LLC 045L INDIANAPLS 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.