Question 1

Which global Anycast and Tier-1 DNS addresses are useful reference targets?

Accepted Answer

Global reference targets in the JSON catalog include Cloudflare Public Anycast (1.1.1.1 / 1.0.0.1), Google Public DNS Backbone (8.8.8.8 / 8.8.4.4), Lumen / Level3 Tier-1 Transit Backbone (4.2.2.1 / 4.2.2.2), Quad9 Foundation Global IXP Anycast (9.9.9.9 / 149.112.112.112), Cisco OpenDNS Umbrella Global Backbone (208.67.222.222 / 208.67.220.220).

Question 2

Which continental telecom networks and Internet Exchange hubs does the directory cover?

Accepted Answer

Americas (7): United States · Comcast Xfinity & AT&T US National Carrier (75.75.75.75 / 68.94.156.1), United States · Verizon Enterprise / UUNET Tier-1 Backbone (198.6.1.1 / 198.6.100.25), Brazil · Claro / Embratel & Vivo (Telefónica Brasil) Backbone (200.255.125.211 / 200.204.0.10), Canada · CIRA Canadian Shield National Anycast DNS (149.112.121.10 / 149.112.122.10), Mexico · Telmex / Uninet (América Móvil) National Backbone (200.33.146.209 / 200.33.146.217), Argentina · Telecom Argentina & CABASE Buenos Aires IXP (181.30.128.1 / 200.42.0.108), Chile · Movistar (Telefónica Chile) & Gtd Santiago PIT Chile IXP (200.28.4.129 / 200.75.0.4). Europe and Russia/CIS (15): Germany · Deutsche Telekom AG Backbone (Frankfurt DE-CIX Hub) (194.25.0.68 / 194.25.0.60), United Kingdom · BT (British Telecom) & London LINX Transatlantic Hub (62.6.40.178 / 194.72.0.98), France · Orange France (Transpac) & Free Iliad Backbone (80.10.246.2 / 212.27.40.240), Russia & CIS · Yandex.DNS & Rostelecom MSK-IX Eurasian Backbone (77.88.8.8 / 77.88.8.1), Netherlands & EU · DNS0.eu European Union Anycast & KPN Amsterdam AMS-IX (193.110.81.0 / 195.121.1.34), Spain · Telefónica España (RIMA) & RedIRIS Madrid ESPANIX Backbone (80.58.61.250 / 130.206.1.2), Italy · TIM (Telecom Italia Sparkle) & GARR Milan MIX Backbone (85.37.17.51 / 193.206.141.42), Ireland · Eir (Eircom) National Carrier & Dublin INEX Transatlantic Hub (159.134.0.1 / 159.134.0.2), Switzerland · Swisscom AG National Backbone (Zurich SwissIX Hub) (195.186.1.111 / 195.186.4.111), Portugal · MEO (Altice Portugal) & FCT GigaPIX Lisbon Submarine Hub (212.55.154.174 / 193.136.2.228), Poland · Poland NASK National Backbone & Warsaw PLIX / ICM Hub (192.102.225.53 / 192.195.72.53), Sweden · Tele2 Sverige SWIPNET & Netnod Stockholm Nordic IXP (130.244.127.161 / 192.36.148.17), Czechia · CESNET & NIX.CZ Prague Central-Eastern Europe IXP Backbone (195.113.144.233 / 195.113.144.194), Romania · Digi Romania (RCS & RDS) & Bucharest InterLAN / RONIX Backbone (193.231.100.130 / 193.231.100.134), Hungary · Magyar Telekom & Budapest Internet Exchange (BIX) Backbone (84.2.44.1 / 84.2.46.1). Asia-Pacific, Africa, and Middle East (21): China · Alibaba AliDNS & 114DNS Multi-Carrier BGP Backbone (223.5.5.5 / 114.114.114.114), India · Bharti Airtel & BSNL India National Backbone (125.22.47.125 / 218.248.112.1), Japan · IIJ (Internet Initiative Japan) Tokyo/Osaka IX Backbone (210.130.1.1 / 210.130.0.1), Japan · SoftBank Corp. Trans-Pacific BB Backbone (218.176.253.65 / 218.176.253.97), Singapore · Singtel (Singapore Telecommunications) SEA Hub Backbone (165.21.83.88 / 165.21.100.88), KR (AS4766 / AS9318: 168.126.63.1 / 210.220.163.82), Australia · Telstra Australia National Internet Backbone (139.130.4.5 / 203.50.2.71), Vietnam · Viettel Group & VNPT Vietnam National Carrier Backbone (203.113.131.1 / 203.162.4.191), Philippines · PLDT & Converge ICT Philippines National Fiber Backbone (210.213.133.229 / 161.49.49.49), Thailand · National Telecom Thailand (NT / TOT & CAT Bangkok Gateway) (203.113.24.199 / 61.19.245.245), Malaysia · Telekom Malaysia (TM Unifi) & TIME dotCom MYIX Backbone (1.9.1.9 / 203.121.16.85), Taiwan · Chunghwa Telecom (HiNet) & TWNIC Quad101 Public DNS (168.95.1.1 / 101.101.101.101), Indonesia · CBN Fiber Indonesia & Jakarta IIX / OpenIXP Backbone (202.158.3.7 / 103.19.179.179), South Africa · Telkom SA (SAIX) & Liquid Intelligent Technologies (NAPAfrica IXP) (196.43.1.11 / 196.25.1.1), Egypt & Nigeria · Telecom Egypt (TE Data) & MainOne West Africa Submarine Backbone (163.121.128.134 / 41.78.211.1), UAE & Saudi Arabia · e& (Etisalat UAE) & STC (Saudi Telecom Company) Gulf Backbone (195.229.241.222 / 212.118.241.1), Türkiye · Türkiye ULAKNET & Türk Telekom Eurasian IXP Corridor (Istanbul / Ankara) (185.7.0.4 / 185.7.0.5), Israel · Bezeq International & Israel Internet Exchange (IIX) Mediterranean Hub (192.115.106.35 / 62.219.186.7), Qatar · Ooredoo Qatar & Qatar Internet Exchange (QIX Doha) Gulf Backbone (212.77.192.59 / 212.77.192.60), Kenya · Safaricom & Kenya Internet Exchange Point (KIXP Nairobi / Mombasa) (41.90.64.1 / 41.222.1.1), Morocco · Maroc Telecom (IAM) Casablanca Europe–Africa Submarine Gateway (212.217.0.1 / 212.217.0.12).

Question 3

Does an official public DNS address guarantee a successful ICMP ping reply?

Accepted Answer

No. A provider-published public DNS resolver address supports a documented DNS service. ICMP Echo is a separate protocol and may be blocked, rate-limited, or deprioritized by carrier policies.

Question 4

Does Anycast ping measure latency to the listed country?

Accepted Answer

Not necessarily. Anycast advertises the same IP address from multiple points of presence (PoPs), and BGP routing selects a nearby or routing-preferred node rather than a fixed national geography.