NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 207-355

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 207-355 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 207 blocks

Most active assignees, all time — NPA 207
BELL ATLANTIC MOBILE, INC 3
TELEPORT COMMUNICATIONS AMERICA, LLC - ME 1
PEERLESS NETWORK OF MAINE, LLC- ME 1
PAETEC ITEL, LLC 1
NEW CINGULAR WIRELESS PCS, LLC - DC 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
2006-08-06 207-355-0XXX 0000–0999Assigned CRC COMMUNICATIONS OF MAINE, INC. - ME 1255 NEWPORT ME
2008-05-05 207-355-1XXX 1000–1999Assigned BELL ATLANTIC MOBILE, INC 6386 NEWPORT ME
2004-03-15 207-355-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J NEWPORT ME
— 207-355-3XXX 3000–3999Reserved MID-MAINE TELPLUS DBA MID-MAINE COMMUNICATIONS 4121 NEWPORT ME
2009-01-05 207-355-4XXX 4000–4999Assigned BELL ATLANTIC MOBILE, INC 6386 NEWPORT ME
2007-06-14 207-355-5XXX 5000–5999Assigned BELL ATLANTIC MOBILE, INC 6386 NEWPORT ME
2011-12-23 207-355-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - ME 7777 NEWPORT ME
2018-02-12 207-355-7XXX 7000–7999Assigned PEERLESS NETWORK OF MAINE, LLC- ME 925H NEWPORT ME
2019-02-26 207-355-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEWPORT ME
2018-11-14 207-355-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - ME 882G NEWPORT ME

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.