NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 315-678

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 315-678 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 315 blocks

Most active assignees, all time — NPA 315
BANDWIDTH.COM CLEC, LLC - NY 4
CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 3
TWC IP ENABLED SERVICES, LLC 1
ONVOY, LLC- NY 1
LEVEL 3 COMMUNICATIONS, LLC - NY 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 thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2018-08-08 315-678-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E LYSANDER NY
— 315-678-1XXX 1000–1999Reserved CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 LYSANDER NY
— 315-678-2XXX 2000–2999Reserved CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 LYSANDER NY
2018-05-04 315-678-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E LYSANDER NY
2018-06-11 315-678-4XXX 4000–4999Assigned ONVOY, LLC- NY 384C LYSANDER NY
2007-05-10 315-678-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K LYSANDER NY
2012-04-25 315-678-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E LYSANDER NY
2014-10-16 315-678-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 LYSANDER NY
2018-09-20 315-678-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E LYSANDER NY
— 315-678-9XXX 9000–9999Reserved CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 LYSANDER NY

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.