NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
— 628-200 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C SNFC JUNPR CA
— 628-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 628-227 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SNFC MT-EV CA
— 628-238 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F IGNACIO CA
— 628-261 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J SAUSALITO CA
— 628-271 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H SNFC CNTRL CA
— 628-282 0–9 XXXall 10 · 5 holders which blocks → AT&T - LOCAL 7421 SNFC JUNPR CA
— 628-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 628-333 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C SNFC CNTRL CA
— 628-358 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SNFC CNTRL CA
— 628-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 628-415 not yet reported which blocks → CA
— 628-466 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C SNFC CNTRL CA
— 628-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 628-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST CA
— 628-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 628-666 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C IGNACIO CA
— 628-700 not yet reported which blocks → CA
— 628-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 628-777 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C SNFC MT-EV CA
— 628-789 0–9 XXXall 10 · 5 holders which blocks → LEAP TELECOM, LLC 616J SNFC CNTRL CA
— 628-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 628-888 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C SAN RAFAEL CA
— 628-900 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C SNFC CNTRL CA
— 628-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 628-950 not yet reported which blocks → CA
— 628-958 not yet reported which blocks → CA
— 628-959 not yet reported which blocks → CA
— 628-976 not yet reported which blocks → CA
— 628-999 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C SNFC CNTRL CA
— 629-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TN
— 629-219 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TN 525E MURFREESBO TN
— 629-220 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TN 525E NASHVILLE TN
— 629-224 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F NASHVILLE TN
— 629-229 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - TN 525E NSPRINGHIL TN
— 629-239 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 NASHVILLE TN
— 629-254 0–9 XXXall 10 · 3 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J NASHVILLE TN
— 629-284 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TN 525E HENDERSNVL TN
— 629-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TN
— 629-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TN
— 629-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TN
— 629-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST TN
— 629-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TN
— 629-675 0XXX1XXX3XXX4XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - TN 525E PORTLAND TN
— 629-700 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TN
— 629-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TN
— 629-802 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TN 525E NASHVILLE TN
— 629-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TN
— 629-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TN
— 629-950 not yet reported which blocks → TN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.