| 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 | 2002-10-17 04:00:00 |
| Changed | 2015-06-08 13:31:24 |
| Expires | 2021-10-17 00:00:00 |
| Registrar | NETWORK SOLUTIONS, L |
| Date | IP Address |
| 2018-10-14 | 172.224.14.241 (ClassC) |
| 2026-01-04 | 45.60.11.203 (ClassC) |