DNS Record Lookup
Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain
Hosting & Network
sei.co.jp runs on AS4713, with email configured.
- Hosting network
- AS4713AS4713
- Managed DNS
- Self-hosted / other
- Configured
- IPv6 (AAAA)
- Not enabled
- CAA pinning
- None
Sits alongside 11,257 other sites on AS4713. Stable here since we started watching (Sep 25, 2026).
The apex and www are the same hosting — the apex via A records.
DNS Records for sei.co.jp
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| sei.co.jp | MX | 0 | 50 | sei-co-jp-1.fortimailcloud.com |
| sei.co.jp | MX | 0 | 50 | sei-co-jp-2.fortimailcloud.com |
| sei.co.jp | SOA | 3600 | seigate.sei.co.jp postmaster.sei.co.jp 2026091801 3600 3600 604800 3600 | |
| sei.co.jp | A | 0 | 133.153.71.81 | |
| sei.co.jp | NS | 0 | dnsrv.starnet.ad.jp | |
| sei.co.jp | NS | 0 | seigate.sei.co.jp | |
| sei.co.jp | NS | 0 | ns02.sei.co.jp | |
| sei.co.jp | NS | 0 | seigate-y.sei.co.jp | |
| sei.co.jp | TXT | 0 | MS=ms49416426 | |
| sei.co.jp | TXT | 0 | pardot990122=b88bb161b673a08d66438f8a29bd6707e62a99b844f7e1bdebe4be1e97c7b51d | |
| sei.co.jp | TXT | 0 | docusign=4cbc3985-93d1-4786-b410-ab2a6470067a | |
| sei.co.jp | TXT | 0 | docusign=7890f4ab-4b98-4b7e-a59e-15f8b1082179 | |
| sei.co.jp | TXT | 0 | zscaler-verification-142869811-30012026-DC3Lmq | |
| sei.co.jp | TXT | 0 | _51xgr7vcq9ui30sggs4ojgw5lotjc0m | |
| sei.co.jp | TXT | 0 | ld6q8djsl394431dpjeu5taq14 | |
| sei.co.jp | TXT | 0 | MS=A20182DBDBD2D98D246272C3F76FA5F82A7640E3 | |
| sei.co.jp | TXT | 0 | google-site-verification=aCR9PGxw-NuQfZlz6PfkbQcGseF426XqWjkZFmL36hY | |
| sei.co.jp | TXT | 0 | v=spf1 +ip4:219.106.230.200/29 +ip4:60.56.229.0/28 +ip4:210.249.104.181 +ip4:202.221.44.23 +ip4:18.180.127.81 +ip4:54.64.30.13 include:_spf.jcareers.com include:_spf.salesforce.com ~all | |
| sei.co.jp | TXT | 0 | docusign=57b3d4bf-4529-47cc-8dc9-206f684f1db1 | |
| sei.co.jp | TXT | 0 | sending_domain1055333=e91d625a574ec7be8b082f633ee21fe7c4603936a07f1b12042fc09cdcd2ca23 | |
| sei.co.jp | TXT | 0 | 4l0fkvddmns88fp448kk4127blxrp5nx | |
| sei.co.jp | TXT | 0 | docusign=f7a0ac4f-51b6-40aa-8bb9-2aabc5e8321f | |
| www.sei.co.jp | A | 0 | 133.153.71.81 |
Get alerted the moment sei.co.jp's DNS changes
This page is today's snapshot. Turn on monitoring and we'll watch sei.co.jp continuously, notifying you the moment anything moves across all three signals:
Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
DNS changes
We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
TLS certificate
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
Free for your first domain: uptime, DNS, and certificate together. No credit card.
What's up with DNS →
Our daily roundup of the most interesting DNS changes across the web — hosting and CDN migrations, network moves, and security-config shifts.
Ask about sei.co.jp
BetaAnswers use the live DNS records shown on this page. AI-generated — double-check anything important.
About DNS Records
DNS (Domain Name System) records are instructions that provide information about a domain, including its IP addresses, mail servers, and other services. Common record types include:
- SOA (Start of Authority) - Contains administrative information about the zone
- NS (Nameserver) - Specifies authoritative nameservers for the domain
- A (Address) - Maps a domain to an IPv4 address
- AAAA - Maps a domain to an IPv6 address
- CNAME (Canonical Name) - Creates an alias pointing to another domain
- MX (Mail Exchange) - Specifies mail servers for the domain