NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 508-948

This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026

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

The ten 1,000-number thousand-blocks inside prefix 508-948 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 508 blocks

Most active assignees, all time — NPA 508
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 4
PAETEC ITEL, LLC 2
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 1
TC SYSTEMS, INC. 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
2008-01-31 508-948-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WESTBORO MA
— 508-948-1XXX 1000–1999Reserved TC SYSTEMS, INC. 7135 WESTBORO MA
2008-09-16 508-948-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J WESTBORO MA
2009-12-14 508-948-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WESTBORO MA
2006-10-26 508-948-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WESTBORO MA
2011-05-23 508-948-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WESTBORO MA
2011-10-20 508-948-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J WESTBORO MA
2012-06-05 508-948-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WESTBORO MA
2010-08-03 508-948-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WESTBORO MA
2013-08-07 508-948-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WESTBORO MA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.