IPLIST.NET - challenge21.de
Search for IP or hostnames:
challenge21.de checked at 2025-09-19T18:17:49.157Z 270ms 72/72/72 100% R:34challenge21.de
| NS | n01.public.auth.dns.services.k-net.io | ||||||
| A | 2001:4178:3:a357:62:116:159:4 🇩🇪 InterNetX | ||||||
| PTR | a.customer-auth.net | ||||||
| A | 62.116.159.4🇩🇪 InterNetX | ||||||
| PTR | a.customer-auth.net | ||||||
| NS | n02.public.auth.dns.services.k-net.io | ||||||
| A | 2001:8d8:580:401:217:160:113:37 🇩🇪 IONOS SE | ||||||
| PTR | b.customer-auth.net | ||||||
| A | 217.160.113.37🇩🇪 IONOS SE | ||||||
| PTR | b.customer-auth.net | ||||||
| NS | n03.public.auth.dns.services.k-net.io | ||||||
| A | 2a01:130:2000:118:89:146:248:4 🇩🇪 INTERNET AG Global Network | ||||||
| PTR | c.customer-auth.net | ||||||
| A | 89.146.248.4🇩🇪 INTERNET AG Global Network | ||||||
| PTR | c.customer-auth.net | ||||||
| NS | n04.public.auth.dns.services.k-net.io | ||||||
| A | 2607:f1c0:1800:8091:74:208:254:4 🇺🇸 IONOS SE | ||||||
| PTR | d.customer-auth.net | ||||||
| A | 74.208.254.4🇺🇸 IONOS SE | ||||||
| PTR | d.customer-auth.net | ||||||
| A | 91.208.160.41🇩🇪 ADACOR-AS | ||||||
| PTR | 91-208-160-41.static.ip.adacor.net | ||||||
de
| NS | a.nic.de | ||||||
| NS | f.nic.de | ||||||
| NS | z.nic.de | ||||||
| NS | l.de.net | ||||||
| NS | n.de.net | ||||||
| NS | s.de.net | ||||||
Starts with same word
challenge21.de |
Starts similarily
challenge21.de |
AI analysis
challenge21.de points to a single IP: 91.208.160.41.
Other host names, for instance hausarztverband.de, dasmathematikbuch.de, sydkraft.de, www.gaspool.de and rurnetz.de share IP numbers with challenge21.de.
challenge21.de's delegation is handled by four name servers: n01.public.auth.dns.services.k-net.io, n02.public.auth.dns.services.k-net.io, n03.public.auth.dns.services.k-net.io and n04.public.auth.dns.services.k-net.io.
challenge21.de partially shares name servers with other domains; examples include xn--testen-und-frdern-b0b.de, vpm-verlag.de, schul-start.de, myklett.de and zahlenbuchfanclub.de.
Host names with two IPs:
n01.public.auth.dns.services.k-net.io points to 2001:4178:3:a357:62:116:159:4 and 62.116.159.4
n02.public.auth.dns.services.k-net.io points to 2001:8d8:580:401:217:160:113:37 and 217.160.113.37
n03.public.auth.dns.services.k-net.io points to 2a01:130:2000:118:89:146:248:4 and 89.146.248.4
n04.public.auth.dns.services.k-net.io points to 2607:f1c0:1800:8091:74:208:254:4 and 74.208.254.4