AT&T Ohio
Holding: AT&T Inc
2001-01-05
2018-04-12
About AT&T Ohio
AT&T Ohio is an AT&T-owned incumbent local exchange carrier (ILEC) providing local telephone services in Ohio. It primarily serves retail consumer and business customers with voice, internet, and related wireline services. As a regional Bell Operating Company (RBOC) subsidiary, it operates within AT&T's broader US telecom network, holding state-level Operating Company Numbers (OCNs) and originating thousands of 1,000-number blocks.
- Parent: AT&T Inc.
- Services: local exchange (ILEC), wireline voice, broadband internet, U-verse TV/voice
Sources: AT&T Wholesale Agreement - Defines 'AT&T OHIO' as AT&T owned ILEC in Ohio · The Ohio Bell AT&T Tariff PUCO NO. 20 · AT&T Invests Nearly $300 Million in Columbus-area Networks (2015)
Toll-free side: Related toll-free RespOrg: AT&T (code BSSB1). View on resporgs.com →
Headquarters: Hoffman Estates, IL
Carrier website
att.com: opens in a new tab
Block portfolio at a glance
By age
- Recent (0). Last 18 mo
- Medium (0)
- Old (277)
- Undated (4,100)
Footprint by state
Stronger blue = more blocks issued in that state. ● marks states with activity in the last 18 months.
- Ohio OH · 4,377
Top area codes
Bars show total blocks; red overlay is recent.
Block assignments by year
Member OCNs
1 OCN roll up under AT&T Ohio.
| OCN | Company name on file | HQ | Type | Total | Recent |
|---|---|---|---|---|---|
| 9321 | Ameritech Ohio | Hoffman Estates, IL | Regional Bell Operating Company | 4,377 | · |