NumberResearchThousands-blocks in 636-387
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 636-387 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 |
|---|---|---|---|---|---|---|---|
| — | 636-387-0XXX | 0000–0999 | Reserved | CHARTER IP ENABLED SERVICES, LLC | 792K | ST PETERS | MO |
| — | 636-387-1XXX | 1000–1999 | Reserved | CHARTER IP ENABLED SERVICES, LLC | 792K | ST PETERS | MO |
| 2006-11-21 | 636-387-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ST PETERS | MO |
| 2007-04-11 | 636-387-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ST PETERS | MO |
| 2007-10-18 | 636-387-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | ST PETERS | MO |
| 2007-02-08 | 636-387-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MO | 093F | ST PETERS | MO |
| — | 636-387-6XXX | 6000–6999 | Reserved | CHARTER IP ENABLED SERVICES, LLC | 792K | ST PETERS | MO |
| — | 636-387-7XXX | 7000–7999 | Reserved | CHARTER IP ENABLED SERVICES, LLC | 792K | ST PETERS | MO |
| 2013-02-15 | 636-387-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | ST PETERS | MO |
| 2018-06-12 | 636-387-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ST PETERS | 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.