| Name | Parent zone | Child zone | Authoritative IPs |
| Exists? | Glue/additional records | Exists? |
| dc1-ext-ddi-01a.nml.com | no | yes | A | 216.20.184.10 |
| AAAA | |
| fk1-z6-ib-internet.northwesternmutual.com | no | yes | A | 216.20.176.228 |
| AAAA | |
| mkn-z3-ib-internet.northwesternmutual.com | no | yes | A | 216.20.179.228 |
| AAAA | |
| ns1.northwesternmutual.com | yes | A |
216.20.176.228 | no | A | 216.20.176.228 |
| AAAA | | AAAA | |
| ns2.northwesternmutual.com | yes | A |
216.20.179.228 | no | A | 216.20.179.228 |
| AAAA | | AAAA | |
| ns6.northwesternmutual.com | yes | A |
216.20.184.10 | no | A | 216.20.184.10 |
| AAAA | | AAAA | |
| auth01.ns.uu.net | yes | N/A (out of bailiwick) | yes | A | 198.6.1.81 |
| AAAA | |
| auth61.ns.uu.net | yes | N/A (out of bailiwick) | yes | A | 198.6.1.182 |
| AAAA | |