substack.com - dns.ninja

`substack.com`

DNSSEC	⚠️ Not signed
A	2606:4700:4400::ac40:9638^{🇺🇸 Cloudflare2606:4700:4400::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:440b::6812:25c8^{🇺🇸 Cloudflare2606:4700:440b::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.18.37.200^{Cloudflare104.18.37.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.64.150.56^{🇺🇸 Cloudflare172.64.150.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`ali.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a3b^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ali.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c03b^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`ali.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:203b^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`ali.ns.cloudflare.com`
		A	108.162.192.59^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ali.ns.cloudflare.com`
		A	172.64.32.59^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ali.ns.cloudflare.com`
		A	173.245.58.59^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ali.ns.cloudflare.com`
NS	`lee.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b81^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lee.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c181^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`lee.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2181^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`lee.ns.cloudflare.com`
		A	108.162.193.129^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lee.ns.cloudflare.com`
		A	172.64.33.129^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lee.ns.cloudflare.com`
		A	173.245.59.129^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lee.ns.cloudflare.com`
MX	`mxa.mailgun.org` ⭐
		A	34.149.254.5^{🇺🇸 Google34.148.0.0/14}
			PTR	`5.254.149.34.bc.googleusercontent.com`
MX	`mxb.mailgun.org` ⭐
		A	34.36.182.139^{🇺🇸 Google34.32.0.0/11}
			PTR	`139.182.36.34.bc.googleusercontent.com`
TXT	`facebook-domain-verification=8vbxp2ntmkudc6is3h5r840c9fwo7f`
TXT	`google-site-verification=4V_X38Yf0J4VJcWFwtG38bOS1nkOWeIWJhticlMgNQE`
TXT	`google-site-verification=DAkdykID6WqQM6tT7IfSu9_uB7-qIdB039MA_C3T3eA`
TXT	`google-site-verification=FfNIQIxsRHpj3Y7E_d3N6GFqGgWDZ-sfYojqCilwtqE`
TXT	`google-site-verification=SXEl7_p4SBszcanSWwVc_3-RFky80c0-94janbeeWI4`
TXT	`google-site-verification=vQEKLOUDfKNOQAv9W3EUMiRD6e5ibAEPhc2yCzP7big`
TXT	`tiktok-developers-site-verification=7PgqCAJ52ILLOqf2KELd8uaRfJpuzaLQ`
TXT	`tiktok-developers-site-verification=A9XRSo8lWy5CPFJ0bqI04KCpUZGAAq7p`
TXT	`v=spf1 include:_spf.google.com include:mailgun.org include:mail.zendesk.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.18.37.200, 172.64.150.56
		IPv6 hints	2606:4700:4400::ac40:9638, 2606:4700:440b::6812:25c8
SOA	`ali.ns.cloudflare.com`dns@cloudflare.com serial=2405435214

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1780597289

rank #176 globally
rank #113 in the tld
Semrush Rank:#326 Keywords:20,965,247 Traffic:8,317,919/mo
WOT: SAFE (50/100)
📈 Tranco rank: #496

Substack is a newsletter platform founded in 2017, enabling writers to build paid subscription businesses. With millions of readers and top writers earning over $1 million annually, Substack has revitalized independent journalism and writing.

Substack offers newsletter creation, paid subscriptions, podcasting, and Notes (social features). The platform takes a 10% cut of subscription revenue, making it attractive to independent writers.

Substack's infrastructure handles email delivery for thousands of newsletters with sophisticated deliverability optimization.

DNS for substack.com uses Cloudflare's authoritative DNS infrastructure. Email authentication is critical for newsletter deliverability.

Subdomains

qbcutomerservicenumber.substack.com

ajwriter.substack.com

cardboardpackaging.substack.com

hiringmedia.substack.com

officialhelpcare.substack.com

tytnetwork.substack.com

newsreviews.substack.com

bornfree.substack.com

digitalmoviereview.substack.com

bitdeep.substack.com

sethabramson.substack.com

marcstein.substack.com

constance96e.substack.com

thelefthook.substack.com

gayety.substack.com

wisdomblend.substack.com

drinkswithbroads.substack.com

chandanamandawala.substack.com

javarevisited.substack.com

theeffectiveengineer.substack.com

thaiblog.substack.com

thedingodave.substack.com

condimentclaire.substack.com

0x00000000000.substack.com

lifesciencetranslation.substack.com

nymag.substack.com

com.substack.com

infrastructurecapital.substack.com

michaeljim1.substack.com

ianfujimoto.substack.com

(0x616e616c)ytic.substack.com

bekahdayyy.substack.com

anneapplebaum.substack.com

andrewsullivan.substack.com

mediacowboys.substack.com

exportimportdata.substack.com

ayanaelizabeth.substack.com

gigiscopes.substack.com

diyabutt.substack.com

acnhfringe.substack.com

kellermellowitz.substack.com

mg1.substack.com

cobusgreyling.substack.com

delivery.substack.com

justrifatseo.substack.com

wavestatebliss.substack.com

mule.substack.com

emptyyourcup.substack.com

standerson1.substack.com

mayarodriguezhandmade.substack.com

alanlee.substack.com

customerphonenumber.substack.com

joespring.substack.com

teamproject.substack.com

politicalhumor.substack.com

remotedatascience.substack.com

mg-d0.substack.com

samuelhenry.substack.com

codezeros.substack.com

codestreet.substack.com

fineholeindia471.substack.com

helpdesk1111.substack.com

mayarodriguez.substack.com

aleagueoftheirownmovie.substack.com

theelizabethday.substack.com

giottodf.substack.com

shortshotmedia.substack.com

api.substack.com

simplicius76.substack.com

slseem419.substack.com

webhostingproviders.substack.com

laceiba.substack.com

fasttracknewsletter.substack.com

adriftcfreemovie.substack.com

nickbrownco.substack.com

howtostarvecancer.substack.com

alexmassie.substack.com

wdlady.substack.com

carlbyington.substack.com

theyogamanlab.substack.com

luminousmen.substack.com

mg-238-218.substack.com

imkenross.substack.com

authordanm.substack.com

travelhelpcentersupport.substack.com

abla.substack.com

simonkjones.substack.com

austinscholar.substack.com

greydanus.substack.com

theanatomyofsurvival.substack.com

talesofthecorrupt.substack.com

ifaam.substack.com

finding871.substack.com

sophiabourne.substack.com

darinsimmonsjr.substack.com

lfgraubard.substack.com

garymarcus.substack.com

cmarmitage.substack.com

sarahsalviander.substack.com

theoregongroup.substack.com

Same first word

substack.com

substack.today

substack.net

substack.support

substack.link

substack.co

substack.ai

substack.ca

substack.life

substack.info

Similar names

usbstack.com

stabucks.com

substakc.com

bastucks.com

DNS History

35 records (8 active, 27 former)

●NSali.ns.cloudflare.com2021-08-10 → 2026-06-04 · 3 obs

○ 2019-08-21 23:43:10
● 2021-08-10 13:52:56
● 2026-06-04 18:26:04

●NSlee.ns.cloudflare.com2021-08-10 → 2026-06-04 · 3 obs

○ 2019-08-21 23:43:10
● 2021-08-10 13:52:56
● 2026-06-04 18:26:04

○NSns-1070.awsdns-05.org2019-08-21 → 2019-08-21 · 4 obs

○ 2017-04-08 12:46:32
● 2019-08-21 23:43:10
○ 2021-08-10 13:52:56
○ 2026-06-04 18:26:04

○NSns-1948.awsdns-51.co.uk2019-08-21 → 2019-08-21 · 4 obs

○ 2017-04-08 12:46:32
● 2019-08-21 23:43:10
○ 2021-08-10 13:52:56
○ 2026-06-04 18:26:04

○NSns-212.awsdns-26.com2019-08-21 → 2019-08-21 · 4 obs

○ 2017-04-08 12:46:32
● 2019-08-21 23:43:10
○ 2021-08-10 13:52:56
○ 2026-06-04 18:26:04

○NSns-711.awsdns-24.net2019-08-21 → 2019-08-21 · 4 obs

○ 2017-04-08 12:46:32
● 2019-08-21 23:43:10
○ 2021-08-10 13:52:56
○ 2026-06-04 18:26:04

○NSns1.namebrightdns.com2015-07-22 → 2017-04-08 · 6 obs

● 2015-07-22 01:49:14
○ 2015-11-22 20:21:14
● 2016-03-12 09:40:18
● 2017-04-08 12:46:32
○ 2019-08-21 23:43:10
○ 2026-06-04 18:26:04

○NSns2.namebrightdns.com2015-07-22 → 2017-04-08 · 6 obs

● 2015-07-22 01:49:14
○ 2015-11-22 20:21:14
● 2016-03-12 09:40:18
● 2017-04-08 12:46:32
○ 2019-08-21 23:43:10
○ 2026-06-04 18:26:04

○NSnsg1.namebrightdns.com2015-11-22 → 2016-03-12 · 5 obs

○ 2015-07-22 01:49:14
● 2015-11-22 20:21:14
● 2016-03-12 09:40:18
○ 2016-07-11 19:32:46
○ 2026-06-04 18:26:04

○NSnsg2.namebrightdns.com2015-11-22 → 2015-11-22 · 4 obs

○ 2015-07-22 01:49:14
● 2015-11-22 20:21:14
○ 2016-03-12 09:40:18
○ 2026-06-04 18:26:04

○MXanmail.namebrightmail.com2015-07-22 → 2015-07-22 · 3 obs

● 2015-07-22 01:49:14
○ 2015-11-22 20:21:14
○ 2026-06-04 18:26:04

●MXmxa.mailgun.org2019-08-21 → 2026-06-04 · 3 obs

○ 2015-11-22 20:21:14
● 2019-08-21 23:43:10
● 2026-06-04 18:26:04

●MXmxb.mailgun.org2019-08-21 → 2026-06-04 · 3 obs

○ 2015-11-22 20:21:14
● 2019-08-21 23:43:10
● 2026-06-04 18:26:04

○A104.18.0.2012021-08-10 → 2021-08-10 · 4 obs

○ 2019-08-21 23:43:10
● 2021-08-10 13:52:56
○ 2026-02-14 18:23:28
○ 2026-06-04 18:26:04

○A104.18.1.2012021-08-10 → 2021-08-10 · 4 obs

○ 2019-08-21 23:43:10
● 2021-08-10 13:52:56
○ 2026-02-14 18:23:28
○ 2026-06-04 18:26:04

●A104.18.37.2002026-02-14 → 2026-06-04 · 3 obs

○ 2021-08-10 13:52:56
● 2026-02-14 18:23:28
● 2026-06-04 18:26:04

○A107.23.198.2402016-07-11 → 2016-07-11 · 4 obs

○ 2016-03-12 09:40:18
● 2016-07-11 19:32:46
○ 2017-04-08 12:46:32
○ 2026-06-04 18:26:04

○A13.224.77.1002019-08-21 → 2019-08-21 · 4 obs

○ 2017-04-08 12:46:32
● 2019-08-21 23:43:10
○ 2021-08-10 13:52:56
○ 2026-06-04 18:26:04

○A13.224.77.1122019-08-21 → 2019-08-21 · 4 obs

○ 2017-04-08 12:46:32
● 2019-08-21 23:43:10
○ 2021-08-10 13:52:56
○ 2026-06-04 18:26:04

○A13.224.77.1192019-08-21 → 2019-08-21 · 4 obs

○ 2017-04-08 12:46:32
● 2019-08-21 23:43:10
○ 2021-08-10 13:52:56
○ 2026-06-04 18:26:04

○A13.224.77.172019-08-21 → 2019-08-21 · 4 obs

○ 2017-04-08 12:46:32
● 2019-08-21 23:43:10
○ 2021-08-10 13:52:56
○ 2026-06-04 18:26:04

●A172.64.150.562026-02-14 → 2026-06-04 · 3 obs

○ 2021-08-10 13:52:56
● 2026-02-14 18:23:28
● 2026-06-04 18:26:04

○A2606:4700::6812:1c92021-08-10 → 2021-08-10 · 4 obs

○ 2019-08-21 23:43:10
● 2021-08-10 13:52:56
○ 2026-02-14 18:23:28
○ 2026-06-04 18:26:04

○A2606:4700::6812:c92021-08-10 → 2021-08-10 · 4 obs

○ 2019-08-21 23:43:10
● 2021-08-10 13:52:56
○ 2026-02-14 18:23:28
○ 2026-06-04 18:26:04

●A2606:4700:4400::ac40:96382026-02-14 → 2026-06-04 · 3 obs

○ 2021-08-10 13:52:56
● 2026-02-14 18:23:28
● 2026-06-04 18:26:04

●A2606:4700:440b::6812:25c82026-02-14 → 2026-06-04 · 3 obs

○ 2021-08-10 13:52:56
● 2026-02-14 18:23:28
● 2026-06-04 18:26:04

○A52.0.96.242016-03-12 → 2016-03-12 · 4 obs

○ 2015-11-22 20:21:14
● 2016-03-12 09:40:18
○ 2016-07-11 19:32:46
○ 2026-06-04 18:26:04

○A52.204.129.222017-04-08 → 2017-04-08 · 4 obs

○ 2016-07-11 19:32:46
● 2017-04-08 12:46:32
○ 2019-08-21 23:43:10
○ 2026-06-04 18:26:04

○A52.4.72.1372016-07-11 → 2016-07-11 · 4 obs

○ 2016-03-12 09:40:18
● 2016-07-11 19:32:46
○ 2017-04-08 12:46:32
○ 2026-06-04 18:26:04

○A52.71.117.992016-03-12 → 2016-03-12 · 4 obs

○ 2015-11-22 20:21:14
● 2016-03-12 09:40:18
○ 2016-07-11 19:32:46
○ 2026-06-04 18:26:04

○A54.174.31.2542015-07-22 → 2015-11-22 · 4 obs

● 2015-07-22 01:49:14
● 2015-11-22 20:21:14
○ 2016-03-12 09:40:18
○ 2026-06-04 18:26:04

○A54.208.74.2152015-07-22 → 2015-11-22 · 4 obs

● 2015-07-22 01:49:14
● 2015-11-22 20:21:14
○ 2016-03-12 09:40:18
○ 2026-06-04 18:26:04

○A54.85.127.702017-04-08 → 2017-04-08 · 4 obs

○ 2016-07-11 19:32:46
● 2017-04-08 12:46:32
○ 2019-08-21 23:43:10
○ 2026-06-04 18:26:04

○CNAMEhdredirect-lb-399551664.us-east-1.elb.amazonaws.com2015-07-22 → 2016-07-11 · 4 obs

● 2015-07-22 01:49:14
● 2016-07-11 19:32:46
○ 2017-04-08 12:46:32
○ 2026-06-04 18:26:04

○CNAMEhdredirect-lb3-890977680.us-east-1.elb.amazonaws.com2017-04-08 → 2017-04-08 · 4 obs

○ 2016-07-11 19:32:46
● 2017-04-08 12:46:32
○ 2019-08-21 23:43:10
○ 2026-06-04 18:26:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	h.gtld-servers.net, e.gtld-servers.net, f.gtld-servers.net, i.gtld-servers.net...	-
substack.com	lee.ns.cloudflare.com, ali.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.192.59

NS records: lee.ns.cloudflare.com, ali.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for substack.com (unsigned zone)

⏱️ Timing

Total: 424ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.18.37.200, 172.64.150.56`
AAAA	2	`2606:4700:4400::ac40:9638, 2606:4700:440b::6812:25c8`
NS	2	`ali.ns.cloudflare.com, lee.ns.cloudflare.com`
MX	2	`mxa.mailgun.org (pri: 10), mxb.mailgun.org (pri: 10)`
TXT	9	`facebook-domain-verification=8vbxp2ntmku, google-site-verification=4V_X38Yf0J4VJcW...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`ali.ns.cloudflare.com dns.cloudflare.com`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (lee.ns.cloudflare.com, lee.ns.cloudflare.com, lee.ns.cloudflare.com...)

Analysis

Hierarchy

substack.com is a parent domain of qbcutomerservicenumber.substack.com, ajwriter.substack.com, cardboardpackaging.substack.com, hiringmedia.substack.com, officialhelpcare.substack.com and several hundred other host names.

IP Addresses

substack.com has 4 IP addresses: 104.18.37.200, 172.64.150.56, 2606:4700:4400::ac40:9638 and 2606:4700:440b::6812:25c8.

gabrieleparpiglia.substack.com, snyder.substack.com, html.p.manakaroyalty.substack.com and two other host names share IP numbers with substack.com.

Name Servers

substack.com uses two name servers for its delegation: ali.ns.cloudflare.com and lee.ns.cloudflare.com.

substack.com uses the same name servers as several other domains — among them shadum.com, freedot.biz, substack.link and two more.

substack.com shares at least some of its name servers with other domains, including sap2432xqh.cc, islamizace.cz, 38rz798ic.com and two others.

These name servers are frequently paired with the name servers woz.ns.cloudflare.com and earl.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

ali.ns.cloudflare.com points to 108.162.192.59, 172.64.32.59, 173.245.58.59 and three other IP addresses.

lee.ns.cloudflare.com points to 108.162.193.129, 172.64.33.129, 173.245.59.129 and three other IP addresses.

Mail Servers

Mail for substack.com is handled by two mail servers — mxa.mailgun.org and mxb.mailgun.org.

substack.com uses an identical mail server configuration to several other domains — among them mason-rose.ca, mail.wetnoise.com, post.leadhit.ru and two more.

substack.com has at least partial mail server overlap with other domains such as lokobuzz.com, altroaffitto.it, ashrafulaid.org and two more.

These mail servers commonly appear together with aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two other mail servers.

mxa.mailgun.org and mxb.mailgun.org each resolve to one IP number: mxa.mailgun.org points to 34.149.254.5 and mxb.mailgun.org points to 34.36.182.139.

substack.com - dns.ninja

substack.com

com

Subdomains

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Related

Analysis

Hierarchy

IP Addresses

Name Servers

Mail Servers

`substack.com`

`com`