NumberResearchThousands-blocks in 720-856
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 720-856 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 720 blocks
Most active assignees, all time — NPA 720
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2021-10-25 | 720-856-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CO | 078F | FORTLUPTON | CO |
| 2022-03-29 | 720-856-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | FORTLUPTON | CO |
| 2021-11-05 | 720-856-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CO | 026D | FORTLUPTON | CO |
| 2021-11-05 | 720-856-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CO | 026D | FORTLUPTON | CO |
| 2021-11-05 | 720-856-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CO | 026D | FORTLUPTON | CO |
| 2022-04-22 | 720-856-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | FORTLUPTON | CO |
| 2022-08-10 | 720-856-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | FORTLUPTON | CO |
| 2022-06-23 | 720-856-7XXX | 7000–7999 | Assigned | VONAGE AMERICA LLC | 197D | FORTLUPTON | CO |
| 2024-01-03 | 720-856-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | FORTLUPTON | CO |
| 2021-11-29 | 720-856-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF COLORADO, LLC - CO | 278F | FORTLUPTON | CO |
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.