NumberResearchThousands-blocks in 973-556
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 973-556 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 973 blocks
Most active assignees, all time — NPA 973
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2010-01-27 | 973-556-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - NJ | 118F | ERSKINELKS | NJ |
| — | 973-556-1XXX | 1000–1999 | Reserved | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | ERSKINELKS | NJ |
| 2018-02-09 | 973-556-2XXX | 2000–2999 | Assigned | ONVOY, LLC - NJ | 637C | ERSKINELKS | NJ |
| — | 973-556-3XXX | 3000–3999 | Available | ERSKINELKS | NJ | ||
| 2004-03-15 | 973-556-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NJ | 4804 | ERSKINELKS | NJ |
| 2002-02-27 | 973-556-5XXX | 5000–5999 | Assigned | CABLEVISION LIGHTPATH, INC. - NJ | 4948 | ERSKINELKS | NJ |
| 2002-03-01 | 973-556-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | ERSKINELKS | NJ |
| 2017-05-01 | 973-556-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - NJ | 118F | ERSKINELKS | NJ |
| 2007-10-15 | 973-556-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NJ | 4804 | ERSKINELKS | NJ |
| — | 973-556-9XXX | 9000–9999 | Reserved | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | ERSKINELKS | NJ |
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.