NumberResearchThousands-blocks in 443-441
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
The ten 1,000-number thousand-blocks inside prefix 443-441 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
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
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2013-04-04 | 443-441-0XXX | 0000–0999 | Assigned | PEERLESS NETWORK OF MARYLAND, LLC | 568G | GLENWOOD | MD |
| 2013-04-04 | 443-441-1XXX | 1000–1999 | Assigned | PEERLESS NETWORK OF MARYLAND, LLC | 568G | GLENWOOD | MD |
| 2016-09-22 | 443-441-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | GLENWOOD | MD |
| 2017-04-14 | 443-441-3XXX | 3000–3999 | Assigned | TELNYX LLC | 073H | GLENWOOD | MD |
| 2024-01-08 | 443-441-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | GLENWOOD | MD |
| 2018-01-10 | 443-441-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | GLENWOOD | MD |
| 2024-03-28 | 443-441-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MD | 876D | GLENWOOD | MD |
| 2014-05-14 | 443-441-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | GLENWOOD | MD |
| 2016-05-03 | 443-441-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | GLENWOOD | MD |
| — | 443-441-9XXX | 9000–9999 | Reserved | TELEPORT COMMUNICATIONS AMERICA, LLC - MD | 7325 | GLENWOOD | 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.