Domain Name: DUOLINGO.COM Registry Domain ID: 1583217344_DOMAIN_COM-VRSN Registrar WHOIS Server: whois.registrar.amazon.com Registrar URL: http://registrar.amazon.com Updated Date: 2021-12-24T05:56:32Z Creation Date: 2010-01-26T21:42:38Z Registry Expiry Date: 2023-01-26T21:42:38Z Registrar: Amazon Registrar, Inc. Registrar IANA ID: 468 Registrar Abuse Contact Email: abuse@amazonaws.com Registrar Abuse Contact Phone: +1.2067406200 Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited Name Server: NS-1020.AWSDNS-63.NET Name Server: NS-1117.AWSDNS-11.ORG Name Server: NS-1904.AWSDNS-46.CO.UK Name Server: NS-247.AWSDNS-30.COM DNSSEC: unsigned

duolingo.com has address 184.72.124.184 duolingo.com mail is handled by 10 aspmx.l.google.com. duolingo.com mail is handled by 20 alt1.aspmx.l.google.com. duolingo.com mail is handled by 20 alt2.aspmx.l.google.com. duolingo.com mail is handled by 30 aspmx2.googlemail.com. duolingo.com mail is handled by 30 aspmx3.googlemail.com. duolingo.com mail is handled by 30 aspmx4.googlemail.com. duolingo.com mail is handled by 30 aspmx5.googlemail.com.

; <<>> DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.9 <<>> duolingo.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29425 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 512 ;; QUESTION SECTION: ;duolingo.com. IN A ;; ANSWER SECTION: duolingo.com. 13 IN A 54.165.40.136 ;; Query time: 3 msec ;; SERVER: 8.8.8.8#53(8.8.8.8) ;; WHEN: Tue Nov 08 08:55:09 UTC 2022 ;; MSG SIZE rcvd: 57

Server: 8.8.8.8 Address: 8.8.8.8#53 Non-authoritative answer: Name: duolingo.com Address: 54.165.40.136

PING duolingo.com (184.72.124.184) 56(84) bytes of data. --- duolingo.com ping statistics --- 3 packets transmitted, 0 received, 100% packet loss, time 1999ms

traceroute to duolingo.com (54.165.40.136), 30 hops max, 60 byte packets 1 gateway (172.31.1.1) 8.529 ms 8.046 ms 8.559 ms 2 13700.your-cloud.host (116.203.163.39) 0.430 ms 0.478 ms 0.436 ms 3 * * * 4 static.88-198-250-9.clients.your-server.de (88.198.250.9) 1.246 ms static.88-198-250-13.clients.your-server.de (88.198.250.13) 1.153 ms static.88-198-250-9.clients.your-server.de (88.198.250.9) 1.248 ms 5 spine14.cloud1.nbg1.hetzner.com (213.133.113.69) 1.203 ms spine14.cloud1.nbg1.hetzner.com (213.133.112.109) 1.523 ms spine12.cloud1.nbg1.hetzner.com (78.47.3.45) 1.114 ms 6 static.213-133-112-73.clients.your-server.de (213.133.112.73) 3.303 ms static.213-133-112-85.clients.your-server.de (213.133.112.85) 0.446 ms 3.252 ms 7 juniper6.dc2.nbg1.hetzner.com (213.239.245.78) 0.534 ms juniper4.dc2.nbg1.hetzner.com (213.239.245.26) 0.362 ms juniper4.dc2.nbg1.hetzner.com (213.239.203.138) 0.284 ms 8 nug-b1-link.ip.twelve99.net (62.115.183.232) 0.710 ms nug-b1-link.ip.twelve99.net (213.248.70.0) 0.706 ms nug-b1-link.ip.twelve99.net (62.115.183.232) 0.719 ms 9 prs-bb2-link.ip.twelve99.net (62.115.112.214) 15.095 ms 15.109 ms 15.103 ms 10 prs-bb1-link.ip.twelve99.net (62.115.123.13) 12.299 ms rest-bb1-link.ip.twelve99.net (62.115.122.159) 92.335 ms prs-bb1-link.ip.twelve99.net (62.115.123.13) 11.952 ms 11 ash-bb2-link.ip.twelve99.net (62.115.112.242) 97.791 ms 97.771 ms 94.369 ms 12 ash-b2-link.ip.twelve99.net (62.115.123.125) 97.887 ms 97.511 ms 97.702 ms 13 vadata-ic333118-ash-b2.ip.twelve99-cust.net (62.115.11.183) 99.352 ms vadata-ic333119-ash-b2.ip.twelve99-cust.net (213.248.92.171) 94.320 ms * 14 * * * 15 * * * 16 * * * 17 * * * 18 * * * 19 * * * 20 * * * 21 * * * 22 * * * 23 * * * 24 * * * 25 * * * 26 * * * 27 * * * 28 * * * 29 * * * 30 * * *

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