NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 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, all time — NPA 228
BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 66
NEW CINGULAR WIRELESS PCS, LLC - GA 26
PAETEC ITEL, LLC 25
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 20
ONVOY, LLC - MS 16
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
2026-07-22 228-308 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → VOIP INNOVATIONS, LLC 597F BILOXI MS
2026-03-18 228-500 0XXX5XXX · 2 holders which blocks → AHOI LLC 883K VANCLEAVE MS
2026-02-27 228-339 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BILOXI MS
2025-12-02 228-389 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → WAVENATION, LLC 700J BILOXI MS
2025-10-01 228-446 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - MS 992E BILOXI MS
2025-09-22 228-587 0XXX1XXX2XXX7XXX8XXX9XXX · 2 holders which blocks → RGTN USA, INC. 806K PASSCHRSTN MS
2025-09-17 228-444 0–9 XXXall 10 · 2 holders which blocks → RGTN USA, INC. 806K BILOXI MS
2025-04-25 228-303 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BILOXI MS
2025-04-25 228-306 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BILOXI MS
2025-03-14 228-302 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BILOXI MS
2024-12-13 228-301 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BILOXI MS
2024-06-18 228-298 0XXX1XXX7XXX · 2 holders which blocks → ONVOY, LLC - MS 719E MOSS POINT MS
2024-05-30 228-296 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MS 719E BILOXI MS
2024-05-14 228-294 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - MS 719E OCEAN SPG MS
2024-03-14 228-293 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BILOXI MS
2024-02-28 228-292 0XXX1XXX which blocks → ONVOY, LLC - MS 719E VANCLEAVE MS
2023-09-11 228-291 0XXX1XXX2XXX3XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - MS 719E TANNERWLMS MS
2023-08-10 228-289 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MS 719E BILOXI MS
2023-08-10 228-290 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MS 719E PASSCHRSTN MS
2023-05-23 228-253 0–9 XXXall 10 · 3 holders which blocks → CALLWORKS CORPORATION 475J BILOXI MS
2023-03-31 228-820 0XXX1XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → COMMIO, LLC 939H HURLEY MS
2023-03-24 228-240 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J GULFPORT MS
2023-03-15 228-227 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J BILOXI MS
2022-11-17 228-225 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J PASSCHRSTN MS
2022-10-04 228-203 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J GULFPORT MS
2022-09-30 228-212 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H TANNERWLMS MS
2022-06-14 228-828 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H BILOXI MS
2022-03-16 228-286 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J BILOXI MS
2022-01-20 228-895 0–9 XXXall 10 · 2 holders which blocks → TWILIO INTERNATIONAL, INC. 506J BILOXI MS
2022-01-12 228-837 0XXX1XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HURLEY MS
2021-12-29 228-279 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J GULFPORT MS
2021-12-06 228-278 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 OCEAN SPG MS
2021-10-13 228-600 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H TANNERWLMS MS
2021-06-03 228-288 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H PASSCHRSTN MS
2021-05-25 228-336 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H MOSS POINT MS
2021-04-30 228-250 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H BILOXI MS
2021-04-23 228-910 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MS 719E BILOXI MS
2021-01-07 228-853 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J VANCLEAVE MS
2020-10-01 228-274 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J GULFPORT MS
2020-09-17 228-262 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 478J BILOXI MS
2020-06-03 228-269 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J BILOXI MS
2020-05-28 228-338 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J BILOXI MS
2019-10-29 228-356 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H HURLEY MS
2019-07-03 228-299 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → AT&T - LOCAL 7421 PEARLINGTN MS
2019-06-27 228-277 0–9 XXXall 10 · 5 holders which blocks → VOIP INNOVATIONS, LLC 597F GULFPORT MS
2019-06-14 228-529 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H BILOXI MS
2019-01-22 228-333 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H BILOXI MS
2019-01-22 228-666 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H MOSS POINT MS
2019-01-22 228-800 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H OCEAN SPG MS
2019-01-16 228-999 0–9 XXXall 10 · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J BILOXI MS

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.