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92
Total
100
DNS
100
Email
81
Security
70
Network
100
Availability
Domainexpo.dev
IPv42
IPv62
MX records5
StatusActive
Domain technical report

Expo — Build native apps with React

expo.dev

Expo is the fastest way to build native apps for iOS, Android, and the web with React.

Generated: 2026-08-10T14:26:32-05:00 · Cached result

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IPv42
IPv62
MX5
NS2

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

2 IPv4 address(es) detected.

✓
IPv6 (AAAA)10 / 10 pts · Dns

2 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

2 NS record(s); 2 or more required.

✓
SOA record10 / 10 pts · Dns

Authoritative zone record.

✓
DNSSEC chain15 / 15 pts · Dns

DS and DNSKEY detected.

✓
CAA policy5 / 5 pts · Dns

Certificate authority restriction.

✓
DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓
MX records20 / 20 pts · Mail

5 MX record(s).

✓
SPF25 / 25 pts · Mail

SPF policy published.

✓
DMARC25 / 25 pts · Mail

DMARC policy published.

✓
DKIM20 / 20 pts · Mail

A DKIM selector was verified.

✓
MTA-STS5 / 5 pts · Mail

Mail transport policy.

✓
TLS-RPT5 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

70 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers16 / 35 pts · Security

4 of 9 evaluated headers detected.

!
PTR reverse DNS0 / 30 pts · Network

PTR not detected.

✓
IPv4 diversity35 / 35 pts · Network

Two or more IPv4 addresses receive full points.

✓
IPv6 connectivity35 / 35 pts · Network

AAAA availability.

✓
DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

✓
HTTP response40 / 40 pts · Availability

HTTP/2 200

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

2 record(s)
104.18.5.104
104.18.4.104

AAAA

2 record(s)
2606:4700::6812:568
2606:4700::6812:468

CNAME

0 record(s)
—

Not configured

MX

5 record(s)
10 alt3.aspmx.l.google.com.
10 alt4.aspmx.l.google.com.
5 alt2.aspmx.l.google.com.
5 alt1.aspmx.l.google.com.
1 aspmx.l.google.com.

TXT

7 record(s)
"linkedin-site-verification=f329028e-f5dd-48a3-8489-6cc607cc0edf"
"anthropic-domain-verification-kg78qv=zwGRA0hTm7PLuxuM8515HyCOz"
"stripe-verification=0884d254d82c4c3eb774d03ed72ed7f78688404426031101fb0a359c9b3ff30e"
"status-page-domain-verification=pkt5b56rksrq"
"google-site-verification=u0RXqZnT89wChVAEGxTyhjLHw8JXo4iDq4gin_JJbCY"
"v=spf1 include:_spf.google.com include:sendgrid.net include:servers.mcsv.net include:stspg-customer.com include:22007177.spf04.hubspotemail.net -all"
"MS=ms34416275"

NS

2 record(s)
dale.ns.cloudflare.com.
lucy.ns.cloudflare.com.

SOA

1 record(s)
dale.ns.cloudflare.com. dns.cloudflare.com. 2411850060 10000 2400 604800 1800

CAA

10 record(s)
0 issue "comodoca.com"
0 issue "pki.goog; cansignhttpexchanges=yes"
0 issuewild "pki.goog; cansignhttpexchanges=yes"
0 issue "letsencrypt.org"
0 issuewild "letsencrypt.org"
0 issuewild "digicert.com; cansignhttpexchanges=yes"
0 issuewild "comodoca.com"
0 issue "digicert.com; cansignhttpexchanges=yes"
0 issuewild "ssl.com"
0 issue "ssl.com"

DS

1 record(s)
2371 13 2 3BBECCF585CA2B03600B20DF5756B7D034058ECFD3ABC9E331B26173 7FB6C709

DNSKEY

2 record(s)
257 3 13 mdsswUyr3DPW132mOi8V9xESWE8jTo0dxCjjnopKl+GqJxpVXckHAeF+ KkxLbxILfDLUT0rAK9iUzy1L53eKGQ==
256 3 13 oJMRESz5E4gYzS/q6XDrvU1qMPYIjCWzJaOau8XNEZeqCYKD5ar0IRd8 KqXXFJkqmVfRvMGPmM1x8fGAa2XhSA==

RRSIG

0 record(s)
—

Not configured

NSEC

1 record(s)
\000.expo.dev. A NS SOA PTR HINFO MX TXT AAAA LOC SRV NAPTR CERT SSHFP RRSIG NSEC DNSKEY TLSA SMIMEA HIP CDS CDNSKEY OPENPGPKEY SVCB HTTPS URI CAA

NSEC3

0 record(s)
—

Not configured

SRV

0 record(s)
—

Not configured

NAPTR

0 record(s)
—

Not configured

TLSA

0 record(s)
—

Not configured

SSHFP

0 record(s)
—

Not configured

SPF

Configured
v=spf1 include:_spf.google.com include:sendgrid.net include:servers.mcsv.net include:stspg-customer.com include:22007177.spf04.hubspotemail.net -all

DMARC

Configured
v=DMARC1; p=quarantine; aspf=s; adkim=s

DKIM

Selector google
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxb3dlsz0kCmOhZgE99R5Q4JmFVP1JNni+Kc8egIAGhFs0g4LGetBo5KXcIKMzZ4XxV878aLIQ2zecGSrVCrBN75UQu9dmzk1GgMTbyoiEh/RvZ/YGjby4dwXycPwsviIKc5XWwnGYHjwlY0EMIeEpSuI3Z+4avq6ObNxcsbx9MvCLxySlrF3uHSAnnjbjXiP6Yyxa20x4BCruSLEZkGhzc9rdKlH1GQoI0Y0TnBxwqweLUDaIcOH7AOIsp2Os0Z1iiI7k2AqMsVZY3anMKnvVtrCgUSvVCr1fKO+IUYM9ENFO3lqBCEs7t3fIMUxFdY3jvgzq2q/6BCM0ay+15XpywIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Expo — Build native apps with React
Description
Expo is the fastest way to build native apps for iOS, Android, and the web with React.
Final URL
https://expo.dev/
HTTP status
200

HTTP

Status
HTTP/2 200
Final URL
https://expo.dev/
Version
3
Server
cloudflare
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Google Trust Services
CN
expo.dev
Valid from
2026-07-22T08:19:56-05:00
Valid until
2026-10-20T09:19:53-05:00
Days remaining
70
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

4 active
✓
HSTSImplemented
✓
Content Security PolicyImplemented
✓
X-Content-Type-OptionsImplemented
✓
X-Frame-OptionsImplemented
—
Referrer PolicyNot detected
—
Permissions PolicyNot detected
—
Cross-Origin-Opener-PolicyNot detected
—
Cross-Origin-Embedder-PolicyNot detected
—
Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent
✓
Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
104.18.4.104, 104.18.5.104
49,50 ms
Cloudflare
1.1.1.1
104.18.4.104, 104.18.5.104
18,78 ms
Quad9
9.9.9.9
104.18.4.104, 104.18.5.104
26,32 ms
OpenDNS
208.67.222.222
104.18.4.104, 104.18.5.104
28,31 ms
AdGuard
94.140.14.14
104.18.4.104, 104.18.5.104
44,40 ms

IP, geolocation and ASNAssociated network information

104.18.5.104

No data
success
No
country
region
city
asn
organization
isp

104.18.4.104

No data
success
No
country
region
city
asn
organization
isp

Visitor information

Visitor
ip
216.73.217.62
reverse
country
country_code
region
city
latitude
longitude
isp
organization
asn
timezone
browser
Other
os
Other
language
user_agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
is_bot
Yes
cloudflare
No

SMTPEmail port connectivity

alt3.aspmx.l.google.com

Port 25: Closed/unreachable - 0.8 ms - 
Port 465: Closed/unreachable - 4020.7 ms - 
Port 587: Closed/unreachable - 4016.8 ms -

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