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 318
ELISKA WIRELESS VENTURES SUBSIDIARY I, 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
2019-10-21 318-710 0XXX2XXX3XXX7XXX9XXX · 2 holders which blocks → ONVOY, LLC - LA 749E SAREPTA LA
2019-10-21 318-713 2XXX3XXX4XXX which blocks → ONVOY, LLC - LA 749E SHONGALOO LA
2019-10-02 318-695 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CSC VOICE, LLC 612K CHOUDRANT LA
2019-08-13 318-721 1XXX2XXX3XXX4XXX5XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 BERNICE LA
2019-06-18 318-693 0–9 XXXall 10 · 3 holders which blocks → VOIP INNOVATIONS, LLC 597F SHREVEPORT LA
2019-06-04 318-692 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J MONROE LA
2019-05-21 318-788 0XXX2XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H HOSSTON LA
2019-05-21 318-877 0XXX2XXX3XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H BELCHER LA
2019-05-21 318-977 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H MONROE LA
2019-05-16 318-690 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F MONROE LA
2019-05-07 318-833 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H SHREVEPORT LA
2019-04-15 318-685 0–9 XXXall 10 · 3 holders which blocks → AIRUS, INC. - LA 477H SHREVEPORT LA
2019-03-28 318-691 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J MINDEN LA
2019-03-06 318-333 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E MANGHAM LA
2018-10-12 318-738 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 MONROE LA
2018-10-11 318-720 0XXX1XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - LA 749E BENTON LA
2018-07-23 318-684 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 SHREVEPORT LA
2018-06-15 318-656 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 SHREVEPORT LA
2018-05-08 318-653 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F HAYNESVL LA
2018-03-13 318-642 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VONAGE AMERICA LLC 197D SHREVEPORT LA
2018-02-21 318-252 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E HOMER LA
2017-10-25 318-593 0–9 XXXall 10 · 6 holders which blocks → NORTHEAST TELEPHONE SERVICES - LA 127J BASTROP LA
2017-08-30 318-592 0–9 XXXall 10 · 2 holders which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 ALEXANDRIA LA
2017-07-25 318-589 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 ALEXANDRIA LA
2017-06-21 318-543 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F LISBON LA
2017-06-21 318-546 0XXX2XXX3XXX4XXX5XXX6XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 COTTON VLY LA
2017-04-04 318-679 0XXX1XXX2XXX6XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C CROWVILLE LA
2017-03-28 318-888 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E SHREVEPORT LA
2016-07-08 318-585 1XXX which blocks → ONVOY, LLC - LA 749E SHREVEPORT LA
2016-05-25 318-731 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F VIVIAN LA
2016-05-18 318-569 0XXX1XXX2XXX3XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - LA 749E MOORINGSPT LA
2016-05-18 318-591 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 4 holders which blocks → ONVOY, LLC - LA 749E OIL CITY LA
2016-05-18 318-706 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E HAUGHTON LA
2016-05-18 318-708 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E MINDEN LA
2016-05-18 318-818 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - LA 749E NEWELLTON LA
2016-05-17 318-643 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E HARRISONBG LA
2016-05-13 318-577 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E CALHOUN LA
2016-03-23 318-668 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E OAKDALE LA
2016-03-09 318-667 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E STERLINGTN LA
2016-03-09 318-712 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E LECOMPTE LA
2016-03-09 318-714 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E OAK GROVE LA
2016-03-09 318-718 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - LA 749E BENTON LA
2016-03-09 318-770 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - LA 749E KEATCHIE LA
2016-03-09 318-772 0XXX1XXX2XXX3XXX7XXX8XXX which blocks → ONVOY, LLC - LA 749E DOYLINE LA
2016-03-08 318-409 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - LA 749E MARKSVILLE LA
2016-01-14 318-701 0XXX1XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 SHREVEPORT LA
2015-11-25 318-666 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - LA 749E SHREVEPORT LA
2015-11-23 318-383 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - LA 749E SHREVEPORT LA
2015-08-14 318-900 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - LA 749E SHREVEPORT LA
2015-07-27 318-661 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C RAYVILLE LA

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.