NumberResearchThousands-blocks in 636-385
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 636-385 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 636 blocks
Most active assignees, all time — NPA 636
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2011-05-24 | 636-385-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | OFALLON | MO |
| 2011-03-02 | 636-385-1XXX | 1000–1999 | Assigned | BRIGHTSPEED OF MISSOURI, LLC | 9787 | OFALLON | MO |
| 2012-02-21 | 636-385-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | OFALLON | MO |
| 2012-02-21 | 636-385-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | OFALLON | MO |
| 2013-12-10 | 636-385-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | OFALLON | MO |
| 2013-02-01 | 636-385-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | OFALLON | MO |
| 2014-01-15 | 636-385-6XXX | 6000–6999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | OFALLON | MO |
| 2013-03-26 | 636-385-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | OFALLON | MO |
| 2012-12-19 | 636-385-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | OFALLON | MO |
| 2013-11-04 | 636-385-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | OFALLON | MO |
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.