Thousands-blocks in 612-545

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 612-545 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 612 blocks

Most active assignees, all time — NPA 612

LEVEL 3 TELECOM OF MINNESOTA, LLC - MN 5

AERIAL COMMUNICATIONS, INC. 3

QWEST CORPORATION 1

COMCAST IP PHONE, 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

Recent thousands-block assignments
Assigned	Thousands-block	Last 4 digits	Status	Assignee	OCN	Rate center	State
2004-01-16	612-545-0XXX	0000–0999	Assigned	LEVEL 3 TELECOM OF MINNESOTA, LLC - MN	5312	TWINCITIES	MN
2004-01-16	612-545-1XXX	1000–1999	Assigned	LEVEL 3 TELECOM OF MINNESOTA, LLC - MN	5312	TWINCITIES	MN
2004-01-16	612-545-2XXX	2000–2999	Assigned	LEVEL 3 TELECOM OF MINNESOTA, LLC - MN	5312	TWINCITIES	MN
2004-01-16	612-545-3XXX	3000–3999	Assigned	LEVEL 3 TELECOM OF MINNESOTA, LLC - MN	5312	TWINCITIES	MN
2004-01-16	612-545-4XXX	4000–4999	Assigned	LEVEL 3 TELECOM OF MINNESOTA, LLC - MN	5312	TWINCITIES	MN
2010-09-03	612-545-5XXX	5000–5999	Assigned	COMCAST IP PHONE, LLC	318J	TWINCITIES	MN
2011-04-12	612-545-6XXX	6000–6999	Assigned	AERIAL COMMUNICATIONS, INC.	6701	TWINCITIES	MN
2011-04-12	612-545-7XXX	7000–7999	Assigned	AERIAL COMMUNICATIONS, INC.	6701	TWINCITIES	MN
2011-04-12	612-545-8XXX	8000–8999	Assigned	AERIAL COMMUNICATIONS, INC.	6701	TWINCITIES	MN
—	612-545-9XXX	9000–9999	Reserved	QWEST CORPORATION	9631	TWINCITIES	MN

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.