NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 615-607

This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026

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

The ten 1,000-number thousand-blocks inside prefix 615-607 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 615 blocks

Most active assignees, all time — NPA 615
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 4
NEW CINGULAR WIRELESS PCS, LLC - GA 3
UNITED STATES CELLULAR - TN 1
BOOST SUBSCRIBERCO L.L.C. 1
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
2014-03-03 615-607-0XXX 0000–0999Assigned UNITED STATES CELLULAR - TN 6278 GREENGROVE TN
2019-12-16 615-607-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GREENGROVE TN
2019-12-16 615-607-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GREENGROVE TN
2025-12-30 615-607-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 GREENGROVE TN
2023-03-14 615-607-4XXX 4000–4999Assigned BOOST SUBSCRIBERCO L.L.C. 490J GREENGROVE TN
2024-12-03 615-607-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 GREENGROVE TN
— 615-607-6XXX 6000–6999Available GREENGROVE TN
2023-06-21 615-607-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 GREENGROVE TN
2022-04-15 615-607-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 GREENGROVE TN
2023-10-26 615-607-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GREENGROVE TN

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.