NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 561-273

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 561-273 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 561 blocks

Most active assignees, all time — NPA 561
TELEPORT COMMUNICATIONS AMERICA, LLC - FL 5
OMNIPOINT MIAMI E LICENSE, LLC 2
ONVOY, LLC - FL 1
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL 1
LEVEL 3 COMMUNICATIONS, LLC - FL 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
— 561-273-0XXX 0000–0999Reserved TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 WPALMBEACH FL
— 561-273-1XXX 1000–1999Reserved TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 WPALMBEACH FL
— 561-273-2XXX 2000–2999Reserved TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 WPALMBEACH FL
2005-02-02 561-273-3XXX 3000–3999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 WPALMBEACH FL
— 561-273-4XXX 4000–4999Reserved TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 WPALMBEACH FL
2012-11-26 561-273-5XXX 5000–5999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 WPALMBEACH FL
— 561-273-6XXX 6000–6999Reserved TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 WPALMBEACH FL
2005-03-29 561-273-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 WPALMBEACH FL
2005-05-03 561-273-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL 8664 WPALMBEACH FL
2009-09-03 561-273-9XXX 9000–9999Assigned ONVOY, LLC - FL 937C WPALMBEACH FL

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.