diff --git a/data/inetnum/172.21.100.128_25 b/data/inetnum/172.21.100.128_25
index 7bb275a93..f6fbaabf2 100644
--- a/data/inetnum/172.21.100.128_25
+++ b/data/inetnum/172.21.100.128_25
@@ -6,5 +6,6 @@ country:            CN
 admin-c:            SUNNET-DN42
 tech-c:             SUNNET-DN42
 mnt-by:             SUNNET-MNT
+nserver:            ns1.sun.dn42
 status:             ASSIGNED
 source:             DN42
\ No newline at end of file