NumberResearchThousands-blocks in 660-672
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 660-672 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 660 blocks
Most active assignees, all time — NPA 660
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2010-10-29 | 660-672-0XXX | 0000–0999 | Assigned | CSC VOICE, LLC | 612K | BOONVILLE | MO |
| 2008-12-18 | 660-672-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MO | 993E | BOONVILLE | MO |
| 2005-11-14 | 660-672-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | BOONVILLE | MO |
| 2013-09-05 | 660-672-3XXX | 3000–3999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | BOONVILLE | MO |
| — | 660-672-4XXX | 4000–4999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | BOONVILLE | MO |
| 2011-09-22 | 660-672-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BOONVILLE | MO |
| 2012-12-18 | 660-672-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 7218 | BOONVILLE | MO |
| 2004-01-12 | 660-672-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MO | 093F | BOONVILLE | MO |
| 2014-02-04 | 660-672-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | BOONVILLE | MO |
| 2007-04-25 | 660-672-9XXX | 9000–9999 | Assigned | UNITED STATES CELLULAR - MO | 6275 | BOONVILLE | MO |
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.