| 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 | 2008-05-14 05:03:40 |
| Changed | 2015-06-08 13:31:21 |
| Expires | 2017-03-18 00:00:00 |
| Registrar | NETWORK SOLUTIONS, L |
| Date | IP Address |
| 2025-02-05 | 209.235.125.223 (ClassC) |