underline.io

.io crawl

First seen 2026-04-16 · Last seen 2026-05-16 · ok HTTP/1.1 200 2828 ms crawled 2026-05-11

IE · 18.203.205.206 · AS16509 Amazon.com, Inc.

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title: Underline Science | Access Academic Videos & Scientific Conferences Online
Description: Underline Science is your on-demand video platform for accessing academic videos and global conferences, offering the latest scientific research in your field.
Language: en

Open Graph

url: https://underline.io/
title: Underline Science | Access Academic Videos & Scientific Conferences Online
site name: Underline.io
description: Underline Science is your on-demand video platform for accessing academic videos and global conferences, offering the latest scientific research in your field.

Technology

Server: nginx
CMS: Next.js

Analytics

Google Analytics
Google Tag Manager
Segment

Third-party hosts loaded (4)

cdn.segment.com×1
connect.liblynx.com×1
www.google-analytics.com×1
www.googletagmanager.com×1

Social

DNS records live

NS

ns-1449.awsdns-53.org
ns-1965.awsdns-53.co.uk
ns-426.awsdns-53.com
ns-643.awsdns-16.net

MX

Show 6 MX records

1 aspmx.l.google.com
10 alt3.aspmx.l.google.com
10 alt4.aspmx.l.google.com
15 gylwou4j234lc36odpj2dnjr3o72vd265lr7v3nlbgfnhdzzar3a.mx-verification.google.com
5 alt1.aspmx.l.google.com
5 alt2.aspmx.l.google.com

TXT

google-site-verification=YH8WUud3vGSnzJ3Yp7f2sykZgZVDnzXdmlggi6lkrec
google-site-verification=AU4lltpRtvmOUER4voCG4bKdaD_ySgHvCjs0aWBgsw8

Email authentication partial

SPF

v=spf1 include:_spf.google.com ~all

softfail (~all)

DMARC

v=DMARC1; p=none; rua=mailto:development@underline.io;

policy: none (monitoring only)

DKIM

google: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAofhdaV3SyDdG6F/70DnA0OGTMtYVCuLn0ft2DJOk1MZEsSX0FZkVX3WC3p59G9QbweIIw44lQ8B0pv…

selectors probed

Certificate (current)

Amazon RSA 2048 M02

from 2025-07-15 to 2026-08-12

Expires in 84 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 75/100 Checked live page: https://underline.io/

present

strict-transport-security
x-frame-options
x-content-type-options
permissions-policy

findings

missing Content Security Policy
missing Referrer Policy

Header values

x-frame-options: SAMEORIGIN
permissions-policy: browsing-topics=()
x-content-type-options: nosniff
strict-transport-security: max-age=15768000; includeSubDomains; preload;