| Property | Value |
| Name | Houghton Mifflin Harcourt |
| Organization | Houghton Mifflin Harcourt |
| nameserv@hmhco.com | |
| Address | 222 Berkeley St. |
| Zip Code | 02116 |
| City | Boston |
| State | MA |
| Country | US |
| Phone | +1.6173515000 |
| NameServer | ns6.hmco.com |
| Created | 2006-08-02 13:47:36 |
| Changed | 2015-08-07 12:27:00 |
| Expires | 2021-08-02 13:47:36 |
| Registrar | Network Solutions, L |
| Date | IP Address |
| 2025-09-09 | 3.33.139.32 (ClassC) |