Ameritech Ohio COLD
d/b/a AT&T Ohio
Holding: AT&T Inc
2000 W Att Center Dr, Room 4G33A
Hoffman Estates, IL 60192-5005
AT&T Ohio
2001-01-05
2018-04-12
Several years old. Contact the number directly.
Ameritech Ohio issued these blocks several years ago. Customers swap carriers every few years, so Ameritech Ohio probably no longer holds them. Try calling any number you're interested in. If a person answers, you've found the current owner and can negotiate with them.
A long shot: if you'd like a watch in case we ever gain access to Ameritech Ohio's inventory directly, you can register your interest. We don't currently have visibility into number changes within carriers, so don't count on it.
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 →
Carrier website
att.com: opens in a new tab
HQ: Hoffman Estates, IL


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
Sister OCNs under AT&T Inc
| OCN | Company | Total | Recent |
|---|---|---|---|
| 6534 | New Cingular Wireless PCS LLC - IL | 58,704 | 6,826 |
| 6214 | New Cingular Wireless PCS LLC - GA | 40,046 | 5,473 |
| 6010 | New Cingular Wireless PCS LLC | 38,106 | 3,019 |
| 4036 | New Cingular Wireless PCS LLC - DC | 30,944 | 4,342 |
| 9533 | Southwestern Bell Telephone Company | 26,095 | 0 |
| 9740 | Pacific Bell Telephone Company | 18,541 | 0 |
| 9417 | Bellsouth Telecommunications Inc dba Southern Bell Telephone & Telegraph | 15,734 | 0 |
| 9419 | Bellsouth Telecommunications Inc dba South Central Bell Telephone | 13,075 | 0 |
| 9329 | Ameritech Illinois | 6,645 | 0 |
| 516C | AT&T Enterprises LLC | 5,935 | 113 |
| 9323 | Ameritech Michigan | 5,035 | 0 |
| 9325 | Ameritech Indiana | 2,941 | 0 |
