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
2008-05-13 317-458 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J BARGERSVL IN
2008-05-13 317-683 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F INDIANAPLS IN
2008-05-08 317-530 0–9 XXXall 10 · 7 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 WHITELAND IN
2008-04-15 317-957 0–9 XXXwhole prefix which blocks → LEVEL 3 TELECOM OF INDIANA, LP - IN 7060 INDIANAPLS IN
2008-03-13 317-560 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 FRANKLIN IN
2008-01-25 317-452 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J INDIANAPLS IN
2008-01-18 317-473 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2008-01-11 317-641 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - IN 097D INDIANAPLS IN
2007-12-18 317-493 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2007-11-26 317-589 0XXX1XXX4XXX5XXX8XXX · 4 holders which blocks → BHN IP ENABLED SERVICES, LLC 045L MCCORDSVL IN
2007-11-26 317-609 0XXX4XXX · 2 holders which blocks → BHN IP ENABLED SERVICES, LLC 045L LIZTON IN
2007-08-23 317-586 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 GREENFIELD IN
2007-07-26 317-608 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2007-07-03 317-210 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 MOORESVL IN
2007-06-19 317-602 0–9 XXXall 10 · 3 holders which blocks → BHN IP ENABLED SERVICES, LLC 045L INDIANAPLS IN
2007-05-17 317-620 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 NEWPALSTIN IN
2007-04-16 317-606 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 CICERO IN
2006-03-17 317-474 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 FRANKLIN IN
2006-02-24 317-527 0–9 XXXall 10 · 6 holders which blocks → INDIANA BELL TEL CO INC 9325 ACTON IN
2006-02-13 317-987 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2006-01-26 317-660 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 TELECOM OF INDIANA, LP - IN 7060 CARMEL IN
2006-01-18 317-755 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J INDIANAPLS IN
2006-01-12 317-742 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C PLAINFIELD IN
2005-12-16 317-717 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2005-11-29 317-855 0–9 XXXall 10 · 8 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN 7440 OAKLANDON IN
2005-11-22 317-406 0–9 XXXall 10 · 7 holders which blocks → INDIANA BELL TEL CO INC 9325 PLAINFIELD IN
2005-10-06 317-483 0–9 XXXall 10 · 8 holders which blocks → AT&T ENTERPRISES, LLC 516C MOORESVL IN
2005-10-04 317-300 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J GREENWOOD IN
2005-05-27 317-688 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CARMEL IN
2005-05-04 317-747 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN 7440 FORTVILLE IN
2005-03-28 317-644 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - IN 097D INDIANAPLS IN
2005-02-09 317-777 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2005-02-02 317-664 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2004-10-27 317-449 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C ACTON IN
2004-02-26 317-224 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J INDIANAPLS IN
2004-01-16 317-362 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J INDIANAPLS IN
2003-08-29 317-333 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2003-06-04 317-363 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2003-06-04 317-366 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2002-07-10 317-412 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 FRANKLIN IN
2002-06-18 317-379 4XXX6XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NOBLESVL IN
2002-05-24 317-437 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2002-05-23 317-364 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SHELBYVL IN
2002-03-28 317-945 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
2002-03-21 317-525 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2002-03-06 317-385 3XXX4XXX5XXX6XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 CICERO IN
2001-11-20 317-622 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 CUMBERLAND IN
2001-11-13 317-583 0XXX1XXX8XXX9XXX · 3 holders which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
2001-10-12 317-451 1XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 TELECOM OF INDIANA, LP - IN 7060 DANVILLE IN
2001-10-12 317-565 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 TELECOM OF INDIANA, LP - IN 7060 NOBLESVL 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.