NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 715-721

This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The ten 1,000-number thousand-blocks inside prefix 715-721 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 715 blocks

Most active assignees, all time — NPA 715
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 3
BANDWIDTH.COM CLEC, LLC - WI 2
UNITED STATES CELLULAR - WI 1
TELEPORT COMMUNICATIONS AMERICA, LLC WI 1
METRO SOUTHWEST PCS, LLP 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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2013-10-02 715-721-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 COLBY WI
2014-12-09 715-721-1XXX 1000–1999Assigned METRO SOUTHWEST PCS, LLP 9759 COLBY WI
2013-07-23 715-721-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 COLBY WI
2016-08-23 715-721-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F COLBY WI
2018-05-07 715-721-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F COLBY WI
2017-12-19 715-721-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 COLBY WI
2015-06-18 715-721-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 COLBY WI
2014-10-23 715-721-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J COLBY WI
2018-10-10 715-721-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 COLBY WI
2019-05-29 715-721-9XXX 9000–9999Assigned UNITED STATES CELLULAR - WI 6274 COLBY WI

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.