NumberResearchThousands-blocks in 667-771
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 667-771 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 667 blocks
Most active assignees, all time — NPA 667
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-07-21 | 667-771-0XXX | 0000–0999 | Assigned | INTRADO COMMUNICATIONS, LLC | 820C | BALTIMORE | MD |
| 2015-12-07 | 667-771-1XXX | 1000–1999 | Assigned | WIDE VOICE, LLC - MD | 530H | BALTIMORE | MD |
| 2016-08-01 | 667-771-2XXX | 2000–2999 | Assigned | NUSO, LLC | 551G | BALTIMORE | MD |
| 2016-08-01 | 667-771-3XXX | 3000–3999 | Assigned | NUSO, LLC | 551G | BALTIMORE | MD |
| 2016-08-01 | 667-771-4XXX | 4000–4999 | Assigned | NUSO, LLC | 551G | BALTIMORE | MD |
| 2016-08-01 | 667-771-5XXX | 5000–5999 | Assigned | NUSO, LLC | 551G | BALTIMORE | MD |
| 2016-08-01 | 667-771-6XXX | 6000–6999 | Assigned | NUSO, LLC | 551G | BALTIMORE | MD |
| 2016-10-12 | 667-771-7XXX | 7000–7999 | Assigned | PEERLESS NETWORK OF MARYLAND, LLC | 568G | BALTIMORE | MD |
| 2016-10-12 | 667-771-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF MARYLAND, LLC | 568G | BALTIMORE | MD |
| 2016-05-03 | 667-771-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | BALTIMORE | 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.