NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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
2026-09-15 317-330 9XXX which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WESTNEWTON IN
2026-06-09 317-980 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J INDIANAPLS IN
2026-05-07 317-303 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - IN 097D PLAINFIELD IN
2025-06-20 317-365 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GREENWOOD IN
2024-06-06 317-907 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D INDIANAPLS IN
2024-05-28 317-206 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H FRANKLIN IN
2024-02-08 317-317 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J INDIANAPLS IN
2023-12-05 317-391 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2023-07-25 317-812 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - IN 097D FRANKLIN IN
2023-07-25 317-930 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - IN 097D WHITELAND IN
2023-07-19 317-765 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2023-05-22 317-463 0–9 XXXwhole prefix which blocks → ONVOY, LLC - IN 097D INDIANAPLS IN
2022-12-07 317-314 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 GREENFIELD IN
2022-05-20 317-533 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2021-07-01 317-799 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F DANVILLE IN
2019-05-10 317-779 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2018-08-27 317-785 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F WESTFIELD IN
2017-12-07 317-792 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - IN 097D FISHERS IN
2017-07-14 317-505 0–9 XXXall 10 · 4 holders which blocks → BHN IP ENABLED SERVICES, LLC 045L FORTVILLE IN
2017-06-20 317-680 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 SHELBYVL IN
2017-04-05 317-740 0–9 XXXall 10 · 7 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CARMEL IN
2017-03-20 317-526 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 GREENFIELD IN
2017-03-03 317-516 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J FISHERS IN
2017-02-24 317-349 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F CICERO IN
2016-11-03 317-734 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2016-10-17 317-618 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2016-09-15 317-419 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2016-07-21 317-552 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F INDIANAPLS IN
2016-07-18 317-499 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 INDIANAPLS IN
2016-06-28 317-764 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NOBLESVL IN
2016-06-28 317-778 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2016-05-06 317-676 0–9 XXXwhole prefix which blocks → ONVOY, LLC - IN 097D MARIETTA IN
2016-03-24 317-746 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2016-03-16 317-766 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2016-02-16 317-741 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2016-02-08 317-342 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D ZIONSVILLE IN
2016-01-14 317-556 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2015-12-17 317-751 0–9 XXXall 10 · 3 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 WHITELAND IN
2015-12-08 317-794 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - IN 097D INDIANAPLS IN
2015-11-20 317-854 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - IN 097D INDIANAPLS IN
2015-10-08 317-795 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CARMEL IN
2015-09-09 317-922 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NOBLESVL IN
2015-09-01 317-827 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FISHERS IN
2015-08-06 317-935 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2015-07-22 317-749 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F INDIANAPLS IN
2015-07-21 317-389 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2015-06-12 317-743 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F GREENWOOD IN
2015-06-11 317-744 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J INDIANAPLS IN
2015-06-02 317-648 0–9 XXXall 10 · 4 holders which blocks → HANCOCK COMMUNICATIONS, INC. - IN 7459 TRAFALGAR IN
2015-05-13 317-659 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F FAIRLAND IN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.