indexo.dev

mainspringenergy.com

.com crawl

First seen 2026-04-22 · Last seen 2026-05-18 · ok HTTP/1.1 200 3226 ms crawled 2026-05-16

GB · 94.247.142.1 · AS209242 Cloudflare London, LLC

Reputation 100/100

sector b2b services type homepage

HTML metadata

Title
Mainspring Energy | Flexible Affordable Onsite Power
Description
Flexible onsite generation for data centers, utility, industrial & enterprise applications. Fuel-flexible, fast to deploy, high-efficiency, low NOx power.
Language
en-US
Generator
SEOmatic
Canonical
https://www.mainspringenergy.com/

Open Graph

url
https://www.mainspringenergy.com/
title
Flexible Affordable Onsite Power
locale
en_US
site name
Mainspring Energy
description
Flexible onsite generation for data centers, utility, industrial & enterprise applications. Fuel-flexible, fast to deploy, high-efficiency, low NOx power.

Technology

CDN
Cloudflare
Analytics
  • Google Tag Manager

Third-party hosts loaded (2)

  • www.googletagmanager.com×2
  • www.bugherd.com×1

Social

Registration

Registrar
GoDaddy.com, LLC
Created
2019-04-12
Expires
2027-04-12 327 days left
Updated
2026-04-13
Name servers
  • graham.ns.cloudflare.com
  • jo.ns.cloudflare.com

DNS records live

NS
  • graham.ns.cloudflare.com
  • jo.ns.cloudflare.com
MX
  • 1 aspmx.l.google.com
  • 10 alt3.aspmx.l.google.com
  • 10 alt4.aspmx.l.google.com
  • 5 alt1.aspmx.l.google.com
  • 5 alt2.aspmx.l.google.com
TXT
Show 24 TXT records
  • sending_domain1054303=a22813aca2208f86ca4bdb25fa4deece95eb83c360b12aa6cc46d1e748e7f155
  • _gitlab-pages-verification-code.mainspringenergy.com TXT gitlab-pages-verification-code=818ab15e97c36f0b73854f4b531b32e6
  • slack-domain-verification=mKkrvjTZtvNcS0dh4Kz9fG5e8hMdBFLUz6dcC5Vq
  • gitkraken-domain-verification=6ac5383786a4442d4f33c0c18f012b426eba091c6b515357a8703ded9c7c9bb9
  • pardot1054303=cb5a5d1f010f72a17615fadb69eff524a36e8f3252da5b38629bd159ff8b398d
  • atlassian-domain-verification=6BzKz0EFSe9ljWzVxe0Mqe3r4sd1yaBqw44325VmynEv5IQooQ6oCwKpFrAkeO/8
  • 1password-site-verification=2G3UHAZDHRDDVLMRTI22U44JNQ
  • fireflies-verification=01JQ4FEN8F3PJ4EY63T7X0V6HE.ffverify.fireflies.ai-request-verification=2025-03-24T16:23:27Z
  • autodesk-domain-verification=HQdWYo7O-1XyVWPhSPTO
  • google-site-verification=GUajo7EpkOKuEmLl8eHy4Ab2xMoUW4TbMEpRCPMUNpY
  • adobe-idp-site-verification=98a7fab506e18894f5a0756e8aa0a91fa24f20146d66f0b361955ef677c2213b
  • MS=ms59590818
  • apple-domain-verification=w1xWTtaDMw8qhgAu
  • hibp-verify=dweb_t5bjuxktywvqu7gv4rcbk7pb
  • anthropic-domain-verification-ftt0rf=TT7cR4qLkjBaDTKGXvFDxvjQo
  • pardot1054303=419c682fe1de7f31d7d1229ab318f69a9aee3f0e92e27da109958ad18c90418d
  • zapier-domain-verification-challenge=6398c37b-25cf-4869-964f-9a7629572f1d
  • google-site-verification=MAlcSa2kNQMtfduzz1nzFBkUWShcM7D3lW4NCW1rdKo
  • openai-domain-verification=dv-al4yQD0vsKZMCOQbOmDipikl
  • gtrih0aa2j58n3rsnam5d3bv19
  • google-site-verification=IQBWV4JXWqo36UiaeD5B3aG-J7x1bC74Ex9clywRF60
  • atlassian-domain-verification=GiGoXZRyo2JJmy9fL2SVtmzL7Gl1laSDDOniwF/aHouCUacIvhiXVM0ogoVNCjQ4
  • atlassian-sending-domain-verification=e33e1b2b-ccd5-428d-b169-226957f5174b
  • wiz-domain-verification=a1b9f10cb8a35a2133779581eecd7989d4e1d2db5fe7eae67cd42010918d548e

Email authentication strong

SPF
v=spf1 include:_spf.google.com ~all
softfail (~all)
DMARC
v=DMARC1; p=quarantine; sp=none; pct=1; rua=mailto:7525976e799b4d4f8d354957942d6df3@dmarc-reports.cloudflare.net
policy: quarantine · pct=1 · sp=none
DKIM
  • default: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA2pwLRbl2yosD1OtCbMBLvEmATJ7wl6780KbTx6ZKIaEmZHyLh8wibxymd5FkHc7sSeJ2PpHDp54Bff…
  • google: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAy6WKi4SPFYc0zMeTdjEn1AzHqN5KEGtleWMlYTTTAdv4SPwMLGfayhQkyXAn8bs9wYmeq8exbdBYUf…
  • dkim: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC0STTSXNhM7THP5k/XENRLUDlfLXe133IBb2udQxF8rdv10wPFllHUlF7/nFb1cbA624YCia7iZy2UEmYGwa…
selectors probed

Certificate (current)

E8
from 2026-04-10 to 2026-07-09
Expires in 50 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 85/100 Checked live page: https://www.mainspringenergy.com/

present
  • strict-transport-security
  • content-security-policy
  • x-frame-options
  • x-content-type-options
  • referrer-policy
findings
  • short HSTS max-age
  • weak content type protection
  • missing Permissions Policy
Header values
referrer-policy
no-referrer-when-downgrade, no-referrer-when-downgrade
x-frame-options
DENY
x-content-type-options
nosniff, nosniff
content-security-policy
frame-ancestors 'none';
strict-transport-security
max-age=2592000

Links to (2)

Linked from (1)