NumberResearchThousands-blocks in 970-557
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 970-557 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 970 blocks
Most active assignees, all time — NPA 970
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2017-07-18 | 970-557-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CO | 078F | GRANBY | CO |
| 2012-11-20 | 970-557-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CO | 026D | GRANBY | CO |
| 2014-08-14 | 970-557-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CO | 026D | GRANBY | CO |
| 2009-03-24 | 970-557-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | GRANBY | CO |
| — | 970-557-4XXX | 4000–4999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - CO | 6118 | GRANBY | CO |
| 2013-02-05 | 970-557-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GRANBY | CO |
| 2014-04-25 | 970-557-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | GRANBY | CO |
| 2013-03-07 | 970-557-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CO | 026D | GRANBY | CO |
| 2013-04-02 | 970-557-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF COLORADO, LLC - CO | 278F | GRANBY | CO |
| 2013-04-02 | 970-557-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF COLORADO, LLC - CO | 278F | GRANBY | 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.