How is att.net?

Looks fine risk 0/100

Registered 33 years ago, on no blocklists we checked, valid HTTPS, the site answered 200 in 645 ms.

Why

02050100

finecarefulhigh risk

·Nothing in the checks added risk.

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

The home page, rendered by how.is in a sandboxed browser. Nothing on it is clickable here.

Site

200

645 ms · ends at currently.att.yahoo.com

HTTPS

146 d

left on a DigiCert Inc certificate

Age

33 years

registered 1993-12-13

Blocklists

listings across 5 lists

Everything we looked at

DNS records4 record types

A	144.160.36.42 144.160.155.43
MX	10 mx-att.mail.am0.yahoodns.net
NS	wycu.wy.br.np.els-gms.att.net ohcu.oh.mt.np.els-gms.att.net orcu.or.br.np.els-gms.att.net macu.ma.mt.np.els-gms.att.net
TXT	_exsumc9j6u2e7g7iccym25dxcmqx2k5 _o31pna3ducxknmsrbblabzaalybh5sr v=spf1 include:_ipspf.yahoo.com ~all _5cjze8kob3y03jop5itvts6kdgjgvrq safebreach-domain-verification=a9b5f447-8a17-41da-9760-047975755f63 google-site-verification=z-qj8Cz-ih1b439g-Nn_OScwNvY1crUPY77heRNZNjo _4p9pfhp11oi420ie4rq8tf5xahahkpf

RegistrationCSC Corporate Domains, Inc.

registrar	CSC Corporate Domains, Inc.
registered	1993-12-13
expires	2026-12-12
last changed	2025-12-08
owner	AT&T SERVICES, INC.
nameservers	macu.ma.mt.np.els-gms.att.net ohcu.oh.mt.np.els-gms.att.net orcu.or.br.np.els-gms.att.net wycu.wy.br.np.els-gms.att.net
status	client transfer prohibited server delete prohibited server transfer prohibited server update prohibited

registered 1993-12-13expires 2026-12-12

HTTPS certificate146 days left

valid	yes
issuer	DigiCert Inc
covers	att.com, att.net
protocol	TLSv1.2

issued 2026-02-20expires 2027-03-23

DNSSECinsecure

Domain is not signed with DNSSEC

. → net → att.net

Email authenticationgood

SPF	pass `v=spf1 include:_ipspf.yahoo.com ~all`
DMARC	pass policy quarantine
DKIM	none of 1 common selectors

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

Security scoregrade B · 150/205

Basic Security

10/40missing: DNSSEC Enabled, Nameserver Diversity

Record Security

30/45missing: CAA Records, DKIM Presence

Advanced Security

15/25missing: Mail Server Configuration, IPv6 Support

Domain Reputation

50/50

Threat Detection

45/45missing: Domain Age Check

Blocklists0 listings · 8 lookups

SURBL MultidomainURIBL MultidomainSpamCop144.160.155.43Barracuda144.160.155.43UCEPROTECT Level 1144.160.155.43SpamCop144.160.36.42Barracuda144.160.36.42UCEPROTECT Level 1144.160.36.42

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=att.net" \ -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=att.net"

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

Watch att.net. 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