NumberResearchThousands-blocks in 317-420
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 317-420 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 317 blocks
Most active assignees, all time — NPA 317
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2005-09-02 | 317-420-0XXX | 0000–0999 | Assigned | COMCAST IP PHONE, LLC | 318J | CICERO | IN |
| — | 317-420-1XXX | 1000–1999 | Reserved | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | CICERO | IN |
| 2013-05-15 | 317-420-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - IN | 105F | CICERO | IN |
| — | 317-420-3XXX | 3000–3999 | Reserved | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | CICERO | IN |
| 2015-05-08 | 317-420-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - IN | 105F | CICERO | IN |
| 2016-04-04 | 317-420-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN | 6725 | CICERO | IN |
| 2016-12-14 | 317-420-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - IN | 7314 | CICERO | IN |
| 2015-11-23 | 317-420-7XXX | 7000–7999 | Assigned | ONVOY, LLC - IN | 097D | CICERO | IN |
| 2016-06-14 | 317-420-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - IN | 105F | CICERO | IN |
| — | 317-420-9XXX | 9000–9999 | Reserved | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | CICERO | IN |
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.