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Total

DNS

Email

Security

Network

Availability

Domainlookbook.nu

IPv41

IPv60

MX records5

StatusActive

Domain technical report

lookbook.nu

Generated: 2026-08-11T04:30:15-05:00 · Cached result

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IPv41

IPv60

MX5

NS4

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓

Name server redundancy20 / 20 pts · Dns

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

✓

SOA record10 / 10 pts · Dns

Authoritative zone record.

DNSSEC chain0 / 15 pts · Dns

Both DS and DNSKEY are required.

CAA policy0 / 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-STS0 / 5 pts · Mail

Mail transport policy.

TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

Valid TLS certificate0 / 55 pts · Security

No valid certificate was retrieved.

Certificate lifetime0 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers0 / 35 pts · Security

0 of 9 evaluated headers detected.

✓

PTR reverse DNS30 / 30 pts · Network

PTR: 178.141.211.130.bc.googleusercontent.com

IPv4 diversity20 / 35 pts · Network

Two or more IPv4 addresses receive full points.

IPv6 connectivity0 / 35 pts · Network

AAAA availability.

✓

DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

HTTP response0 / 40 pts · Availability

No successful HTTP response.

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)

130.211.141.178

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

5 record(s)

10 alt3.aspmx.l.google.com.
5 alt2.aspmx.l.google.com.
1 aspmx.l.google.com.
10 alt4.aspmx.l.google.com.
5 alt1.aspmx.l.google.com.

TXT

1 record(s)

"v=spf1 mx include:_spf.google.com include:u9446.wl.sendgrid.net include:smtp1.uservoice.com ip4:45.55.239.125 ip6:2604:a880:800:10::148f:3001 ~all"

NS

4 record(s)

ns-1167.awsdns-17.org.
ns-1625.awsdns-11.co.uk.
ns-345.awsdns-43.com.
ns-973.awsdns-57.net.

SOA

1 record(s)

ns-973.awsdns-57.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400

CAA

0 record(s)

—

Not configured

DS

0 record(s)

—

Not configured

DNSKEY

0 record(s)

—

Not configured

RRSIG

1 record(s)

NSEC 13 2 7200 20260824123129 20260810110129 63193 nu. 8/j2JCz48e4iU8N0lJ519Urclax99CwE5C3VMN+hmnxfeAWEpC7b12++ JqLRqGKZgNLUoM0O6JjszD2ND8cQbw==

NSEC

0 record(s)

—

Not configured

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 mx include:_spf.google.com include:u9446.wl.sendgrid.net include:smtp1.uservoice.com ip4:45.55.239.125 ip6:2604:a880:800:10::148f:3001 ~all

DMARC

Configured

v=DMARC1; p=none; pct=100; rua=mailto:dmarc@lookbook.nu

DKIM

Selector s1

k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAy0I85b4Edw9Zvf2iVmw7U1hKlS+xeUhzCooHfgK+KREdGW+uIjEbo6qtEDrfVnyYStKF0T/hN8R6CBLv2giHn/Cfd45+vfpatdxxQ6Kh2CmnJVYfsiVqaSY9Au46lXxauV/kDfYCH17rRKGBRw5sPctamLAt8goOy55dRcLlSvELhwXjo0UlDoX9dALy6R0pdUTiSNrxQOvyPgXUkBhxAutC4rhosML/XryVdLyK9mdvkVcIa5vUQXuDveS5rBq5KGUqMh5gNdpDhgraZslnbGN3Yz1JyMz94FanDX5K1BJvJnaxJsMC8e1S4DpnV6dSm/Z9hervNII1IvcHViOa8wIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

No data

Title

Description

Final URL

https://lookbook.nu/

HTTP status

HTTP

Status

Final URL

https://lookbook.nu/

Version

Server

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Unavailable

Available

Issuer

Valid from

Valid until

Days remaining

Protocol

Cipher

Security headers

0 active

—

HSTSNot detected

—

Content Security PolicyNot detected

—

X-Content-Type-OptionsNot detected

—

X-Frame-OptionsNot detected

—

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

130.211.141.178

49,54 ms

Cloudflare

1.1.1.1

130.211.141.178

76,23 ms

Quad9

9.9.9.9

130.211.141.178

50,58 ms

OpenDNS

208.67.222.222

130.211.141.178

149,26 ms

AdGuard

94.140.14.14

130.211.141.178

254,32 ms

IP, geolocation and ASNAssociated network information

130.211.141.178

Identified

success

Yes

country

United States

country_code

region

Iowa

city

Kane

latitude

41.2615195

longitude

-95.8304271

asn

396982

organization

Google LLC

isp

Google LLC

timezone

America/Chicago

Visitor information

Visitor

216.73.217.62

reverse

country

country_code

region

city

latitude

longitude

isp

organization

asn

timezone

browser

Other

language

user_agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

is_bot

Yes

cloudflare

SMTPEmail port connectivity

alt3.aspmx.l.google.com

Port 25: Closed/unreachable - 1.3 ms - 
Port 465: Closed/unreachable - 4020.7 ms - 
Port 587: Closed/unreachable - 4020.1 ms -

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