NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 215-488

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 215-488 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 215 blocks

Most active assignees, all time — NPA 215
CORE COMMUNICATIONS, INC. - PA 3
TELEPORT COMMUNICATIONS AMERICA, LLC - PA 1
SERVICE ELECTRIC TELEPHONE COMPANY, LLC 1
ONVOY SPECTRUM, LLC 1
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 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
2003-01-15 215-488-0XXX 0000–0999Assigned SERVICE ELECTRIC TELEPHONE COMPANY, LLC 8320 PHPHSBZN45 PA
2004-03-19 215-488-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN45 PA
2005-07-27 215-488-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHPHSBZN45 PA
2018-10-15 215-488-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN45 PA
2022-03-29 215-488-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H PHPHSBZN45 PA
2011-08-29 215-488-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F PHPHSBZN45 PA
2018-10-15 215-488-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN45 PA
2004-10-20 215-488-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PHPHSBZN45 PA
2016-01-12 215-488-8XXX 8000–8999Assigned BARR TELL USA, INC. - PA 752H PHPHSBZN45 PA
— 215-488-9XXX 9000–9999Reserved TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 PHPHSBZN45 PA

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.