NumberResearchThousands-blocks in 708-223
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 708-223 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 708-223-0XXX | 0000–0999 | Reserved | COMCAST IP PHONE, LLC | 318J | MAYWOOD | IL |
| — | 708-223-1XXX | 1000–1999 | Reserved | FIRST COMMUNICATIONS, LLC | 460K | MAYWOOD | IL |
| 2005-11-23 | 708-223-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | MAYWOOD | IL |
| 2005-01-27 | 708-223-3XXX | 3000–3999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | MAYWOOD | IL |
| 2011-12-28 | 708-223-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | MAYWOOD | IL |
| 2016-02-12 | 708-223-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | MAYWOOD | IL |
| 2004-10-14 | 708-223-6XXX | 6000–6999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | MAYWOOD | IL |
| 2005-11-23 | 708-223-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | MAYWOOD | IL |
| — | 708-223-8XXX | 8000–8999 | Reserved | COMCAST IP PHONE, LLC | 318J | MAYWOOD | IL |
| 2021-05-21 | 708-223-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | MAYWOOD | 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.