HOW.IS
?

How is grammarly.com?

Looks fine risk 0/100

Registered 17 years ago, on no blocklists we checked, valid HTTPS, the site answered 200 in 165 ms.

Why

02050100
finecarefulhigh risk
  • ·Nothing in the checks added risk.

Rule-based: domain age, blocklists, TLS. A heuristic, not a guarantee.

How grammarly.com looks right now
The home page, rendered by how.is in a sandboxed browser. Nothing on it is clickable here.
Site
200
165 ms · ends at www.grammarly.com
HTTPS
72 d
left on a Amazon certificate
Age
17 years
registered 2009-07-01
Blocklists
0
listings across 5 lists

Everything we looked at

DNS records4 record types
A18.154.227.38
18.154.227.40
18.154.227.9
18.154.227.75
MX30 alt2.aspmx.l.google.com
10 aspmx.l.google.com
20 alt1.aspmx.l.google.com
40 aspmx2.googlemail.com
50 aspmx3.googlemail.com
NSns-1221.awsdns-24.org
ns-1588.awsdns-06.co.uk
ns-422.awsdns-52.com
ns-835.awsdns-40.net
TXTdrift-domain-verification=dd77af23e1275ecb2950661245abc7a0fd9e77afd02ac31622c9bfd3dedaa95f
MS=96F5E682E3FF0FBFEF84219A18A34BD963086AA8
google-site-verification=vLifvjc088vXpEUDE0PT7j2gsQM8Cpa2LVSR-Jee1uc
atlassian-domain-verification=whH-NvC3ViXrafg4bTERPBlxvBNLVWD0xV5WbI2C9ZtubXKcXRh2sa07+lKL0C/X
pardot894581=aff2191872eb522eed66a62c7d03601ebdae662415c6b1292a7211c01ade257a
cloudpiercer-verification=b9dab0c22ef96ee3f675f59252321336
apple-domain-verification=YmUmlcXeygZ70cqL
google-site-verification=69QWyrCZ5njFAMqdC5AZvP2TQVe9JDtIzIdDpDa5X3Q
v=spf1 include:_spf.google.com include:stspg-customer.com include:_spf.salesforce.com include:_spf.psm.knowbe4.com include:et._spf.pardot.com include:spf.redpoints.com ip4:23.21.109.197 ip4:23.21.109.212 ip4:147.160.167.0/26 -all
zapier-domain-verification-challenge=afd60c3e-f878-4432-8732-b3d8c7be71b4
jamf-site-verification=3h6Uug2q-ggp8Ahy3ymzUQ
reachdesk-verification=abmXP4MomXpwkAXG2Pp9jCWvSUYsj4BxDgJwAceSvxIOtDmqWSI7jrpnVZJpU1oL
parallels-domain-verification=e9daf5c51c7f493d9ad9bbd319d9fafabcba12e1cb7d410190931380d6b4341b
google-site-verification=nm62OjxlwL4GOt1mxARtnuQVJ4kAv0hPO2ANkoAOCYc
cloudflare_dashboard_sso=23b2bdffef1d7658015b6e25e57bccd7
status-page-domain-verification=c1c19zbcrb82
adobe-idp-site-verification=3e651ed09e9293cf53b3383b231a710750a73dba4666d6053fa650194bb0d153
onetrust-domain-verification=4efd20418d3e40b9bdf3020fb12b119c
wrike-verification=NjcwODE1NjpjYjczN2QwMDg4NmRhNmJiZDFkMWIzMWYwZGQ2NGM3MWE5NTVjMGViNDU0ZDIwMTk2YmU2MjU3Y2YwMzk1NWU1
stripe-verification=DDD2DA0949B1569AAFE87F982AD66028F68771E0D3B139416E7F5C86135A4271
docusign=b16227bc-8eed-4fe9-8c59-f857f8f6f8d5
stripe-verification=F3633F704D2137D4082346041FB48DCDBFCF74C5A24135727275D7B7E4DEB0FE
miro-verification=f95626cc26c38db4b72a6079d5dcf7583be7698c
detectify-verification=bd77af0941d04364d951a027120fc676
00D80000000d8Lr=1TBUk00000005Fp
stripe-verification=00ba8e3b5ee449df83a366291b29b6922f8da284fca2ea669531fd0892474ccc
cursor-domain-verification-sv7qgx=BEg0YCBYeeYuHLiFNLXfRXpGb
notion-domain-verification=qgWEdy4xdexKhlLmcsnhTK6VHNWVDn9Dp9OMfw174MR
google-site-verification=ZqvEoku9LrEhC7sEyYwgLag482jCuUKIdGXG1uYTwHU
onx=d50f7c6e-7adb-4d07-92a3-f314e524cebd
numeric-domain-verification-pfx4f5=iIOICNIh7pE2U8eyIwKgR0bXO
notion-domain-verification=Tbg0jfq1eLv144zfB1H5FrCMNbgqilor4HT8VvzhBYM
stripe-verification=6324a0d2fe10167d6ed0189caaf601080a24c01493b6d1215252f247df6b14f4
stripe-verification=E633B1A2291B29012E4779284D3E827EAD320388EA6BD12432766B8919DBA117
anthropic-domain-verification-wrasvv=rz25qD50tNGOmhMHoA731afHD
docusign=98257b54-419f-4c8e-8387-ee6572462c1a
_aji9bs0zsnxbc7s3hgopff5i69gdpoa
MS=ms11892818
docker-verification=e6d67e2c-ddc8-4a8b-bb3b-87efa1b6c380
vmware-cloud-verification-3df5f056-6241-4c3a-9c78-234f8b64f93a
postman-domain-verification=ec4f4a9f21532e35cebc57b2370017a0d7f66b2bb21ad6a1d3e21cb0e65bbb98a3a0a3d3d335c36362dfde716a276d2595f051b665a81116f862c0edde2be8fe
stripe-verification=E83A60C996A179AD84F0E51EDBC1043DEF1822E88D98B955AA73D1AB0C21B7C5
RegistrationGoDaddy.com, LLC
registrarGoDaddy.com, LLC
registered2009-07-01
expires2029-07-01
last changed2026-07-02
nameserversns-1221.awsdns-24.org
ns-1588.awsdns-06.co.uk
ns-422.awsdns-52.com
ns-835.awsdns-40.net
statusclient delete prohibited
client renew prohibited
client transfer prohibited
client update prohibited
registered 2009-07-01expires 2029-07-01
HTTPS certificate72 days left
validyes
issuerAmazon
coverswww.grammarly.com, grammarly.com
protocolTLSv1.3
issued 2026-06-23expires 2027-01-06
DNSSECinsecure

Domain is not signed with DNSSEC

. → com → grammarly.com
Email authenticationexcellent
SPFpass v=spf1 include:_spf.google.com include:stspg-customer.com include:_spf.salesforce.com include:_spf.psm.knowbe4.com include:et._spf.pardot.com include:spf.redpoints.com ip4:23.21.109.197 ip4:23.21.109.212 ip4:147.160.167.0/26 -all
DMARCpass policy reject
DKIMfound: google

Whether mail claiming to be from this domain can be checked as genuine.

Security scoregrade B · 165/205
Basic Security
20/40missing: DNSSEC Enabled
Record Security
30/45missing: CAA Records, DKIM Presence
Advanced Security
20/25missing: IPv6 Support
Domain Reputation
50/50
Threat Detection
45/45missing: Domain Age Check
Blocklists0 listings · 14 lookups
SURBL MultidomainURIBL MultidomainSpamCop18.154.227.75Barracuda18.154.227.75UCEPROTECT Level 118.154.227.75SpamCop18.154.227.38Barracuda18.154.227.38UCEPROTECT Level 118.154.227.38SpamCop18.154.227.40Barracuda18.154.227.40UCEPROTECT Level 118.154.227.40SpamCop18.154.227.9Barracuda18.154.227.9UCEPROTECT Level 118.154.227.9

Green: clean. Red: listed. Grey: the list did not answer.

Ask it yourself

Agents get this as data. Bought through the API, the checks behind this page cost $0.070: profile $0.025 + trust $0.020 + screenshot $0.020 + site status $0.005.

curl "https://how.is/v1/domain/trust?domain=grammarly.com" \ -H "Authorization: Bearer $HOWIS_KEY" # or pay per call in USDC (x402), no key: the 402 tells your agent the price curl -i "https://how.is/v1/domain/profile?domain=grammarly.com"

MCP: add https://how.is/mcp to Claude, Codex or Cursor (one-line install) and ask for domain_trust on grammarly.com. Reference: /llms.txt.

Watch grammarly.com. DNS read at the source every 5 minutes; certificate, blocklists and expiry every 6 hours. You get an email only when something changes.

Watch — $1 / 30 days