Ameritech Illinois HOT
d/b/a AT&T Illinois
Part of the Ameritech Illinois group. 2 OCNs across 2 states · 8,666 blocks combined.
Holding: AT&T Inc
2000 W Att Center Dr, Room 4G33A
Hoffman Estates, IL 60192-5005
AT&T Illinois
1998-07-14
2017-02-17
Just issued. Call the number first.
Ameritech Illinois issued these blocks within the last 18 months, so many of the numbers in them may not have been assigned to customers yet. Call any number you're interested in, and if it doesn't go to a customer you can contact Ameritech Illinois and you might be able to get it from them.
About AT&T Illinois
AT&T Illinois is the Illinois operating company of AT&T Inc., functioning as a Regional Bell Operating Company (RBOC) providing local exchange and related telecommunications services within the state. It primarily serves consumers and businesses with home internet, fiber optic services, and channel services for intrastate connectivity. As part of the former Illinois Bell Telephone Company, it operates within AT&T's broader national footprint, holding state-level Operating Company Numbers (OCNs) and managing thousands of number blocks.
- Parent: AT&T Inc.
- Services: local exchange, fiber internet, channel services
Sources: AT&T Carrier Mills, IL | Home Services, Plans & Availability · AT&T ILLINOIS GUIDEBOOK PART 15 - Channel Services · AT&T in Illinois - Home & Business Services
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
Block assignments by year
Area codes
| NPA | Blocks | Recent | Last |
|---|---|---|---|
| 847 | 1,374 | · | 2011-02-10 |
| 312 | 1,144 | · | 2012-10-19 |
| 630 | 812 | · | 2015-01-20 |
| 773 | 792 | · | 2009-07-01 |
| 815 | 540 | · | 2011-03-24 |
| 708 | 533 | · | 2013-09-25 |
| 618 | 443 | · | 2010-03-15 |
| 217 | 422 | · | 2017-02-17 |
| 309 | 330 | · | 2013-11-20 |
| 224 | 186 | · | 2016-01-26 |
| 872 | 33 | · | 2016-04-11 |
| 331 | 29 | · | 2012-10-26 |
| 779 | 4 | · | 2006-11-17 |
| 262 | 3 | · | · |
Sister OCNs in the Ameritech Illinois group
Same customer-facing carrier, different state-registered OCN. Combined stats are on the Ameritech Illinois group page.
| OCN | Company name on file | HQ state | Total | Recent |
|---|---|---|---|---|
| 9327 | Ameritech Wisconsin | IL | 2,021 | · |
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 |
| 516C | AT&T Enterprises LLC | 5,935 | 113 |
| 9323 | Ameritech Michigan | 5,035 | 0 |
| 9321 | Ameritech Ohio | 4,377 | 0 |
| 9325 | Ameritech Indiana | 2,941 | 0 |