NumberResearchThousands-blocks in 618-310
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 618-310 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 618 blocks
Most active assignees, all time — NPA 618
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 618-310-0XXX | 0000–0999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | BELLEVILLE | IL |
| 2002-09-16 | 618-310-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | BELLEVILLE | IL |
| 2006-01-13 | 618-310-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | BELLEVILLE | IL |
| 2005-08-15 | 618-310-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | BELLEVILLE | IL |
| 2008-06-03 | 618-310-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVILLE | IL |
| 2008-12-29 | 618-310-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVILLE | IL |
| 2009-02-13 | 618-310-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVILLE | IL |
| 2007-06-12 | 618-310-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | BELLEVILLE | IL |
| 2009-03-17 | 618-310-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVILLE | IL |
| 2009-03-17 | 618-310-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVILLE | IL |
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.