NumberResearchThousands-blocks in 708-523
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 708-523 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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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2013-04-03 | 708-523-0XXX | 0000–0999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | WILLOW SPG | IL |
| 2013-04-03 | 708-523-1XXX | 1000–1999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | WILLOW SPG | IL |
| 2021-02-02 | 708-523-2XXX | 2000–2999 | Assigned | ONVOY, LLC | 224C | WILLOW SPG | IL |
| 2006-11-10 | 708-523-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WILLOW SPG | IL |
| — | 708-523-4XXX | 4000–4999 | Available | WILLOW SPG | IL | ||
| — | 708-523-5XXX | 5000–5999 | Reserved | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | WILLOW SPG | IL |
| — | 708-523-6XXX | 6000–6999 | Available | WILLOW SPG | IL | ||
| 2016-03-02 | 708-523-7XXX | 7000–7999 | Assigned | ONVOY, LLC | 224C | WILLOW SPG | IL |
| 2016-03-02 | 708-523-8XXX | 8000–8999 | Assigned | ONVOY, LLC | 224C | WILLOW SPG | IL |
| 2018-06-18 | 708-523-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | WILLOW SPG | 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.