NumberResearchThousands-blocks in 773-920
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 773-920 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
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2006-06-15 | 773-920-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN06 | IL |
| 2025-03-13 | 773-920-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | CHICGOZN06 | IL |
| 2021-08-18 | 773-920-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN06 | IL |
| — | 773-920-3XXX | 3000–3999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | CHICGOZN06 | IL |
| — | 773-920-4XXX | 4000–4999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | CHICGOZN06 | IL |
| 2021-10-13 | 773-920-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHICGOZN06 | IL |
| 2020-06-19 | 773-920-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHICGOZN06 | IL |
| — | 773-920-7XXX | 7000–7999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | CHICGOZN06 | IL |
| 2007-08-24 | 773-920-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN06 | IL |
| 2021-04-22 | 773-920-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHICGOZN06 | 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.