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a1-systems.com

Observed Jul 28, 2026, 18:40 UTC (15h ago). Every field below was attested with an Ed25519 signature at scan time. Catalog observation, re-checked on rotation - watch it for 5-minute checks.

Verify this receipt yourself + Watch this domain
Up right now
Runs onA1 Systems
Secured byGlobalSign
Registered withRegional Network Information Center, JSC dba RU-CENTER
tranco_100k
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat a1-systems.com actually stands on - every host below is a signed observation
a1-systems.com
A / AAAA
91.213.5.55
A1 Systemsserves the site
NS
ns1.a1-systems.comns2.a1-systems.comns3.a1-systems.com
a1-systems.comanswers its DNS
MX
mx1.a1-systems.commx2.a1-systems.com
a1-systems.comreceives its email
TLS
*.a1-systems.com
GlobalSign nv-saissued its certificate

DNS Records

A 1

  • 91.213.5.55

MX 2

  • 10mx1.a1-systems.com
  • 20mx2.a1-systems.com

TXT 3

  • globalsign-domain-verification=Z-wHmeLt3vTP3jJR6-M1PSu1vP6rJjhjSYqOvsYGBF
  • v=spf1 mx include:spf.unisender.com ip4:199.68.197.122 ip4:103.228.169.247 ip4:31.44.89.53 -all
  • v=DMARC1; p=reject; rua=mailto:dmarc@a1-systems.com

NS 3

  • ns1.a1-systems.com
  • ns2.a1-systems.com
  • ns3.a1-systems.com

SOA 1

  • ns1.a1-systems.com noc.a1-systems.com

SRV 3

  • owa.a1-systems.com:443 p0
  • owa.a1-systems.com:993 p0
  • owa.a1-systems.com:587 p0

CAA 3

  • iodef "mailto:it@a1-systems.com"
  • issue "digicert.com"
  • issue "globalsign.com"

TLS Certificates (3)

Common NameIssuerExpires
*.a1-systems.com C=BE, O=GlobalSign nv-sa, CN=GlobalSign ECC OV SSL CA 2018 Tue, 05 Jan 2027 13:10:18 +0000
GlobalSign ECC OV SSL CA 2018 2.5.4.11=GlobalSign ECC Root CA - R5, O=GlobalSign, CN=GlobalSign Tue, 21 Nov 2028 00:00:00 +0000
GlobalSign 2.5.4.11=GlobalSign ECC Root CA - R5, O=GlobalSign, CN=GlobalSign Tue, 19 Jan 2038 03:14:07 +0000

Subdomains (0)

None observed.

The proof

Signed at scan time. Check the math yourself. Every line above is part of one signed observation. Re-hash it and check the Ed25519 signature in your own browser; nothing leaves your machine.

Verify this receipt

Put the receipt on your own site. A live badge showing what DomainDrift observes and signs for a1-systems.com. It updates itself. It attests a signed observation - not that the site is safe.

DomainDrift signed-observation badge for a1-systems.com <a href="https://domaindrift.io/t/a1-systems.com"> <img src="https://domaindrift.io/badge/a1-systems.com.svg" width="300" height="64" alt="DomainDrift signed observations for a1-systems.com"> </a>

Ed25519 Receipt

Receipt ID
rcpt_e697213a707bbc01
Output Hash
28aa0d4b06e1844137fa9a929ca0e86b8e993f2fb35ff22bd78afbc51d55ca56
Signature
ed25519:53cd2d5090c2e0add3d3729fb77c71ba1914dccdc845bb9efba1309961d2cfd3112be41d5a63ebcc1135e67360b0fb24c73fe3d705cadf6b76505082b6e8920e
Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent
(genesis)
Plane
fast
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