NumberResearchThousands-blocks in 708-231
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 708-231 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 708 blocks
Most active assignees, all time — NPA 708
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2005-01-29 | 708-231-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | BEECHER | IL |
| 2005-01-25 | 708-231-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | BEECHER | IL |
| 2002-04-30 | 708-231-2XXX | 2000–2999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | BEECHER | IL |
| 2004-09-22 | 708-231-3XXX | 3000–3999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | BEECHER | IL |
| 2003-12-25 | 708-231-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | BEECHER | IL |
| — | 708-231-5XXX | 5000–5999 | Available | BEECHER | IL | ||
| 2005-02-08 | 708-231-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | BEECHER | IL |
| — | 708-231-7XXX | 7000–7999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | BEECHER | IL |
| 2001-02-07 | 708-231-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | BEECHER | IL |
| 2000-08-18 | 708-231-9XXX | 9000–9999 | Assigned | ONVOY, LLC | 224C | BEECHER | IL |
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.