Substack Application

The following page provides details on domains, networks, IPs, hosting services, and content delivery networks used by Substack.

Description

Substack is an online platform that allows writers, journalists, and creators to publish and monetize newsletters and other content.

Category	Business
Web Link	Substack - Home Page

Application Domains

The application domains data shown here is available in our Netify Data Feeds solution. The data is accessible via our IP API as well as downloadable datasets.

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Domains

Primary Domains

Primary Domains are owned and managed by the application vendor.

Platform Domains are often provided by hosting providers, content delivery networks, SaaS platforms and other third parties. It is important to identify these domains for DNS filters and hostname blocklists.

Platform Domains

Statuspage

{hidden}.statuspage.io

SaaS - Software-as-a-Service

Applications often use various third party platforms for providing authentication, advertising, cybersecurity, e-mail services and more. The Software-as-a-Service (SaaS) platforms used by Substack are summarized below.

SaaS	# of IPs
Mailgun	2
Zendesk	2

Service	Category	Sample IP	IP Count
Mailgun	Mail	34.102.239.211	2 IPs
Zendesk	Business	216.198.53.1	2 IPs

Content Delivery Networks - CDNs

In order to get information to end users more quickly, many applications are distributed from multiple geographical points-of-presence (PoPs) using Content Delivery Networks (CDNs). Each PoP can host many IPs to deliver an application. A sample IP is provided.

Take special note of CDNs that use Anycast technology. Anycast makes it possible to route a single IP address to a variety of different geographic locations. In other words, one global Anycast IP is hosted in multiple geographic locations.

CDNs	# of IPs
Amazon CloudFront	8277
Cloudflare	4

Anycast

CDN	Network	Location	Sample IP	IPs
Cloudflare	Cloudflare	Global	104.18.37.200	4 IPs

PoP Locations

CDN	Network	PoP	Location	IPs
Amazon CloudFront	Amazon CloudFront	Edge - Columbus	United States	4 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Berlin	Germany	40 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Buenos Aires	Argentina	116 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Lisbon	Portugal	78 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Johannesburg	South Africa	283 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Madrid	Spain	44 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Bucharest	Romania	43 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Santiago de Queretaro	Mexico	115 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Muscat	Oman	87 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Vienna	Austria	287 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Montreal	Canada	199 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Dallas	United States	96 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Dublin	Ireland	148 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Santiago	Chile	66 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Perth	Australia	47 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Seattle	United States	15 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Osaka	Japan	12 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Cape Town	South Africa	37 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Helsinki	Finland	111 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Marseille	France	218 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Tokyo	Japan	94 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Stockholm	Sweden	155 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Manila	Philippines	58 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Singapore	Singapore	139 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Paris	France	220 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Zurich	Switzerland	193 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Milan	Italy	194 IPs
Amazon CloudFront	Amazon CloudFront	Edge - London	United Kingdom	303 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Rome	Italy	12 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Kansas City	United States	57 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Miami	United States	371 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Ashburn	United States	46 IPs
Amazon CloudFront	Amazon CloudFront	Edge - San Francisco	United States	89 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Seoul	South Korea	80 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Istanbul	Turkey	31 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Taipei	Taiwan	47 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Tel Aviv	Israel	220 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Chicago	United States	91 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Houston	United States	21 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Los Angeles	United States	99 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Manama	Bahrain	164 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Nairobi	Kenya	223 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Hyderabad	India	67 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Copenhagen	Denmark	148 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Toronto	Canada	85 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Hong Kong	Hong Kong	230 IPs
Amazon CloudFront	Amazon CloudFront	Edge - New York	United States	149 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Sydney	Australia	108 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Manchester	United Kingdom	20 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Warsaw	Poland	171 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Amsterdam	Netherlands	169 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Kuala Lumpur	Malaysia	63 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Mumbai	India	70 IPs
Amazon CloudFront	Amazon CloudFront	Edge - New Delhi	India	14 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Munich	Germany	22 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Dusseldorf	Germany	28 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Sao Paulo	Brazil	95 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Chennai	India	56 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Hamburg	Germany	70 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Melbourne	Australia	63 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Phoenix	United States	4 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Brisbane	Australia	12 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Bogota	Colombia	4 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Atlanta	United States	18 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Kolkata	India	31 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Bangkok	Thailand	56 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Frankfurt	Germany	337 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Vancouver	Canada	24 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Barcelona	Spain	104 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Budapest	Hungary	223 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Brussels	Belgium	9 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Sofia	Bulgaria	154 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Newark	United States	57 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Athens	Greece	80 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Oslo	Norway	47 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Prague	Czechia	178 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Zagreb	Croatia	128 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Portland	United States	21 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Jakarta	Indonesia	24 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Dubai	United Arab Emirates	70 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Fortaleza	Brazil	69 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Lagos	Nigeria	32 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Lima	Peru	12 IPs
Amazon CloudFront	Amazon CloudFront	Edge - Denver	United States	2 IPs