NumberResearchThousands-blocks in 773-915
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 773-915 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 773 blocks
Most active assignees, all time — NPA 773
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2020-01-27 | 773-915-0XXX | 0000–0999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | CHICGOZN07 | IL |
| 2025-04-15 | 773-915-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHICGOZN07 | IL |
| 2025-04-15 | 773-915-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHICGOZN07 | IL |
| 2005-04-29 | 773-915-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | CHICGOZN07 | IL |
| 2006-02-03 | 773-915-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | CHICGOZN07 | IL |
| 2025-04-15 | 773-915-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHICGOZN07 | IL |
| 2021-03-02 | 773-915-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | CHICGOZN07 | IL |
| 2021-02-05 | 773-915-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN07 | IL |
| — | 773-915-8XXX | 8000–8999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | CHICGOZN07 | IL |
| — | 773-915-9XXX | 9000–9999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | CHICGOZN07 | 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.