Thousands-blocks in 443-978

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 443-978 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 443 blocks

Most active assignees, all time — NPA 443

ONVOY, LLC - MD 2

OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 2

COMCAST IP PHONE, LLC 2

TELNYX LLC 1

METROPCS, INC. 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

Recent thousands-block assignments
Assigned	Thousands-block	Last 4 digits	Status	Assignee	OCN	Rate center	State
2011-11-23	443-978-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	SALISBURY	MD
2016-06-16	443-978-1XXX	1000–1999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	SALISBURY	MD
2018-09-20	443-978-2XXX	2000–2999	Assigned	METROPCS, INC.	5562	SALISBURY	MD
2017-07-27	443-978-3XXX	3000–3999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	SALISBURY	MD
2024-01-30	443-978-4XXX	4000–4999	Assigned	ONVOY, LLC - MD	876D	SALISBURY	MD
2024-01-30	443-978-5XXX	5000–5999	Assigned	ONVOY, LLC - MD	876D	SALISBURY	MD
2024-03-05	443-978-6XXX	6000–6999	Assigned	TELNYX LLC	073H	SALISBURY	MD
2016-02-11	443-978-7XXX	7000–7999	Assigned	COMCAST IP PHONE, LLC	318J	SALISBURY	MD
2015-12-30	443-978-8XXX	8000–8999	Assigned	COMCAST IP PHONE, LLC	318J	SALISBURY	MD
2016-06-16	443-978-9XXX	9000–9999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	SALISBURY	MD

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.