# # ARIN WHOIS data and services are subject to the Terms of Use # available at: https://www.arin.net/resources/registry/whois/tou/ # # If you see inaccuracies in the results, please report at # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ # # Copyright 1997-2025, American Registry for Internet Numbers, Ltd. # # start NetRange: 73.0.0.0 - 73.255.255.255 CIDR: 73.0.0.0/8 NetName: CABLE-1 NetHandle: NET-73-0-0-0-1 Parent: NET73 (NET-73-0-0-0-0) NetType: Direct Allocation OriginAS: Organization: Comcast Cable Communications, LLC (CCCS) RegDate: 2005-04-19 Updated: 2021-01-25 Ref: https://rdap.arin.net/registry/ip/73.0.0.0 OrgName: Comcast Cable Communications, LLC OrgId: CCCS Address: 1800 Bishops Gate Blvd City: Mt Laurel StateProv: NJ PostalCode: 08054 Country: US RegDate: 2001-09-18 Updated: 2020-11-18 Ref: https://rdap.arin.net/registry/entity/CCCS OrgRoutingHandle: ROUTI25-ARIN OrgRoutingName: Routing OrgRoutingPhone: +1-856-792-2300 OrgRoutingEmail: routing@comcast.com OrgRoutingRef: https://rdap.arin.net/registry/entity/ROUTI25-ARIN OrgAbuseHandle: NAPO-ARIN OrgAbuseName: Network Abuse and Policy Observance OrgAbusePhone: +1-888-565-4329 OrgAbuseEmail: abuse@comcast.net OrgAbuseRef: https://rdap.arin.net/registry/entity/NAPO-ARIN OrgTechHandle: IC161-ARIN OrgTechName: Comcast Cable Communications Inc OrgTechPhone: +1-856-792-2300 OrgTechEmail: CNIPEO-Ip-registration@cable.comcast.com OrgTechRef: https://rdap.arin.net/registry/entity/IC161-ARIN # end # start NetRange: 73.100.0.0 - 73.100.255.255 CIDR: 73.100.0.0/16 NetName: BOSTON-22 NetHandle: NET-73-100-0-0-1 Parent: CABLE-1 (NET-73-0-0-0-1) NetType: Reassigned OriginAS: Customer: Comcast IP Services, L.L.C. (C06054657) RegDate: 2016-03-01 Updated: 2016-03-01 Ref: https://rdap.arin.net/registry/ip/73.100.0.0 CustName: Comcast IP Services, L.L.C. Address: 1800 Bishops Gate Blvd City: Mount Laurel StateProv: NJ PostalCode: 08054 Country: US RegDate: 2016-02-29 Updated: 2016-08-31 Ref: https://rdap.arin.net/registry/entity/C06054657 OrgRoutingHandle: ROUTI25-ARIN OrgRoutingName: Routing OrgRoutingPhone: +1-856-792-2300 OrgRoutingEmail: routing@comcast.com OrgRoutingRef: https://rdap.arin.net/registry/entity/ROUTI25-ARIN OrgAbuseHandle: NAPO-ARIN OrgAbuseName: Network Abuse and Policy Observance OrgAbusePhone: +1-888-565-4329 OrgAbuseEmail: abuse@comcast.net OrgAbuseRef: https://rdap.arin.net/registry/entity/NAPO-ARIN OrgTechHandle: IC161-ARIN OrgTechName: Comcast Cable Communications Inc OrgTechPhone: +1-856-792-2300 OrgTechEmail: CNIPEO-Ip-registration@cable.comcast.com OrgTechRef: https://rdap.arin.net/registry/entity/IC161-ARIN # end # # ARIN WHOIS data and services are subject to the Terms of Use # available at: https://www.arin.net/resources/registry/whois/tou/ # # If you see inaccuracies in the results, please report at # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ # # Copyright 1997-2025, American Registry for Internet Numbers, Ltd. #

250.51.100.73.in-addr.arpa domain name pointer c-73-100-51-250.hsd1.ma.comcast.net.

; <<>> DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.9 <<>> 73.100.51.250 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 55401 ;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 512 ;; QUESTION SECTION: ;73.100.51.250. IN A ;; AUTHORITY SECTION: . 86399 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2025120802 1800 900 604800 86400 ;; Query time: 5 msec ;; SERVER: 8.8.8.8#53(8.8.8.8) ;; WHEN: Mon Dec 08 22:31:32 UTC 2025 ;; MSG SIZE rcvd: 117

250.51.100.73.in-addr.arpa name = c-73-100-51-250.hsd1.ma.comcast.net. Authoritative answers can be found from:

PING 73.100.51.250 (73.100.51.250) 56(84) bytes of data. --- 73.100.51.250 ping statistics --- 3 packets transmitted, 0 received, 100% packet loss, time 1999ms

traceroute to 73.100.51.250 (73.100.51.250), 30 hops max, 60 byte packets 1 gateway (172.31.1.1) 2.225 ms 2.459 ms 2.482 ms 2 21739.your-cloud.host (49.12.143.167) 0.390 ms 0.392 ms 0.407 ms 3 * * * 4 * * * 5 spine15.cloud1.nbg1.hetzner.com (213.133.114.57) 0.768 ms spine16.cloud1.nbg1.hetzner.com (85.10.237.165) 0.747 ms spine15.cloud1.nbg1.hetzner.com (213.133.114.49) 0.750 ms 6 core12.nbg1.hetzner.com (213.239.239.141) 0.871 ms core11.nbg1.hetzner.com (213.239.239.121) 0.544 ms 0.674 ms 7 juniper5.dc2.nbg1.hetzner.com (213.239.229.162) 0.782 ms juniper4.dc2.nbg1.hetzner.com (213.239.245.26) 0.498 ms juniper5.dc2.nbg1.hetzner.com (213.239.229.162) 0.420 ms 8 nug-b2-link.ip.twelve99.net (62.115.183.232) 14.605 ms 14.609 ms 14.544 ms 9 prs-bb2-link.ip.twelve99.net (62.115.112.214) 22.330 ms 22.381 ms 22.361 ms 10 ash-bb2-link.ip.twelve99.net (62.115.140.107) 111.086 ms * * 11 ash-b2-link.ip.twelve99.net (62.115.141.50) 103.704 ms ash-b2-link.ip.twelve99.net (62.115.123.125) 109.940 ms ash-b2-link.ip.twelve99.net (62.115.141.50) 103.516 ms 12 62.115.51.194 (62.115.51.194) 109.263 ms 108.934 ms 110.168 ms 13 be-1212-cs02.newark.nj.ibone.comcast.net (96.110.35.85) 101.710 ms 99.196 ms be-1412-cs04.newark.nj.ibone.comcast.net (96.110.35.93) 95.823 ms 14 96.110.42.194 (96.110.42.194) 122.965 ms 96.110.42.198 (96.110.42.198) 109.937 ms 96.110.42.206 (96.110.42.206) 109.143 ms 15 po-1-xar02.maynard.ma.boston.comcast.net (96.108.159.46) 111.305 ms 109.273 ms 109.395 ms 16 po-1-rur902.maynard.ma.boston.comcast.net (96.108.159.34) 100.140 ms 99.910 ms 100.867 ms 17 68.87.154.110 (68.87.154.110) 102.398 ms 102.480 ms 100.945 ms 18 * * * 19 * * * 20 * * * 21 * * * 22 * * * 23 * * * 24 * * * 25 * * * 26 * * * 27 * * * 28 * * * 29 * * * 30 * * *

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