A records not consistent
Authoritative servers agree, but not all other servers do.
- This is normal for A records. They can be geo- or round-robin load-balanced.
- Some servers may have cached older records. Wait for their TTLs to expire.
DNS server
TTL
Time To Live
The amount of time a DNS record is cached for.
Records returned by these servers
The official source of information for this domain,
managed by the owner of upenn.edu .
managed by the owner of upenn.edu .
adns1.nnn.upenn.edu
128.91.2.53
The official source of information for this domain,
managed by the owner of upenn.edu .
managed by the owner of upenn.edu .
adns2.nnn.upenn.edu
128.91.254.53
The official source of information for this domain,
managed by the owner of upenn.edu .
managed by the owner of upenn.edu .
adns3.nnn.upenn.edu
128.91.251.53
The official source of information for this domain,
managed by the owner of upenn.edu .
managed by the owner of upenn.edu .
adns4.upenn.edu
208.94.148.32
The official source of information for this domain,
managed by the owner of upenn.edu .
managed by the owner of upenn.edu .
adns5.upenn.edu
208.80.124.32
The official source of information for this domain,
managed by the owner of upenn.edu .
managed by the owner of upenn.edu .
adns6.upenn.edu
208.80.126.32
The official source of information for this domain,
managed by the owner of upenn.edu .
managed by the owner of upenn.edu .
dns1.udel.edu
128.175.13.16
The official source of information for this domain,
managed by the owner of upenn.edu .
managed by the owner of upenn.edu .
dns2.udel.edu
128.175.13.17
South Africa
105.243.200.6
Brazil
144.22.131.193
Russia
146.185.243.131
United States of America
150.136.61.69
Australia
170.64.132.168
Ukraine
37.53.70.212
India
49.143.252.50
Netherlands
82.97.246.78
2a10:50c0::ad1:ff
2a0d:2a00:2::
2606:4700:4700::1001
8.8.8.8
NextDNS
45.90.28.66
OpenDns
208.67.220.220
2620:fe::fe
Canada
158.69.36.244
No A records found