NumberResearchThousands-blocks in 443-689
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
The ten 1,000-number thousand-blocks inside prefix 443-689 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 443-689-0XXX | 0000–0999 | Reserved | PAETEC ITEL, LLC | 829J | COCKEYSVL | MD |
| 2021-02-22 | 443-689-1XXX | 1000–1999 | Assigned | PEERLESS NETWORK OF MARYLAND, LLC | 568G | COCKEYSVL | MD |
| 2017-05-18 | 443-689-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | COCKEYSVL | MD |
| 2016-11-18 | 443-689-3XXX | 3000–3999 | Assigned | BARR TELL USA, INC. | 964H | COCKEYSVL | MD |
| — | 443-689-4XXX | 4000–4999 | Reserved | PAETEC ITEL, LLC | 829J | COCKEYSVL | MD |
| — | 443-689-5XXX | 5000–5999 | Reserved | PAETEC ITEL, LLC | 829J | COCKEYSVL | MD |
| — | 443-689-6XXX | 6000–6999 | Available | COCKEYSVL | MD | ||
| 2013-10-18 | 443-689-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | COCKEYSVL | MD |
| 2023-07-07 | 443-689-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | COCKEYSVL | MD |
| 2021-04-23 | 443-689-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | COCKEYSVL | MD |
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.