NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 215-377

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 215-377 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 5
TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 1
OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 1
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 1
IP HORIZON 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
2017-06-19 215-377-0XXX 0000–0999Assigned IP HORIZON LLC 515J PHPHSBZN44 PA
2006-01-31 215-377-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PHPHSBZN44 PA
2018-10-15 215-377-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN44 PA
2018-10-15 215-377-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN44 PA
2018-10-15 215-377-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN44 PA
2002-08-19 215-377-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 7142 PHPHSBZN44 PA
2018-10-15 215-377-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN44 PA
2016-01-12 215-377-7XXX 7000–7999Assigned BARR TELL USA, INC. - PA 752H PHPHSBZN44 PA
2018-10-15 215-377-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN44 PA
— 215-377-9XXX 9000–9999Reserved MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHPHSBZN44 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.