Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

77 hosts · 441 ms

HostCertsFirst seenLast seenDNS
*.boy.co.jp 5 2025-07-02 2026-08-10 —
auth-itb.hamagin365.boy.co.jp 1 2026-06-04 2026-06-04 ok
adm-itb.hamagin365.boy.co.jp 2 2026-04-06 2026-09-06 ok
app-itb.hamagin365.boy.co.jp 2 2026-04-06 2026-09-06 ok
auth-stg.hamagin365.boy.co.jp 1 2026-06-04 2026-06-04 ok
adm-stg.hamagin365.boy.co.jp 2 2026-04-06 2026-09-06 ok
app-stg.hamagin365.boy.co.jp 2 2026-04-06 2026-09-06 ok
appbkr-stg.hamagin365.boy.co.jp 2 2025-08-02 2026-07-03 ok
auth.hamagin365.boy.co.jp 2 2026-08-10 2026-08-10 ok
adm.hamagin365.boy.co.jp 2 2025-07-16 2026-06-16 ok
app.hamagin365.boy.co.jp 2 2025-07-16 2026-06-16 ok
appbkr.hamagin365.boy.co.jp 2 2025-07-05 2026-06-05 ok
t0138.boy.co.jp 4 2026-02-25 2026-07-14 ok
accountopen.gaika.boy.co.jp 2 2026-02-24 2026-07-12 ok
stg-accountopen.gaika.boy.co.jp 1 2026-01-11 2026-01-11 ok
2a57j77p1228p62s8cqkd7zi5ub3e8e.stg-accountopen.gaika.boy.co.jp 1 2026-01-11 2026-01-11 nxdomain
bpm.stg-accountopen.gaika.boy.co.jp 1 2026-01-18 2026-01-18 ok
dev-accountopen.gaika.boy.co.jp 1 2026-01-11 2026-01-11 ok
2a57j789bh91ryha6juowhz9uy6flwy.dev-accountopen.gaika.boy.co.jp 1 2026-01-11 2026-01-11 nxdomain
2a57j77p1228p62s8cqkd7zi5ub3e8e.accountopen.gaika.boy.co.jp 2 2026-02-24 2026-07-12 nxdomain
bpm.accountopen.gaika.boy.co.jp 2 2026-02-21 2026-07-09 ok
cloud.ma.boy.co.jp 2 2025-07-26 2026-07-13 ok
image.ma.boy.co.jp 4 2026-04-07 2026-09-07 ok
click.ma.boy.co.jp 2 2025-07-26 2026-07-13 ok
view.ma.boy.co.jp 2 2025-07-26 2026-07-14 ok
cs-reception-web.boy.co.jp 2 2026-03-11 2026-07-19 ok
dev.cs-reception-web.boy.co.jp 3 2025-12-05 2026-07-19 ok
app.365payb.boy.co.jp 2 2026-02-24 2026-07-27 ok
stg-app.365payb.boy.co.jp 1 2025-12-04 2025-12-04 ok
2a57j78crjvxhbizdg68we3szdr9uw1.stg-app.365payb.boy.co.jp 1 2025-12-04 2025-12-04 nxdomain
portal.stg-app.365payb.boy.co.jp 1 2025-11-18 2025-11-18 ok
dev-app.365payb.boy.co.jp 2 2025-11-04 2025-12-04 ok
2a57j77o52zap2vxgzrzrdu7z4qtlq6.dev-app.365payb.boy.co.jp 1 2025-12-04 2025-12-04 nxdomain
portal.dev-app.365payb.boy.co.jp 1 2025-11-10 2025-11-10 ok
rijfftszipqsiyj6p2m5lhdhiq6ozwb.app.365payb.boy.co.jp 2 2026-02-24 2026-07-27 nxdomain
portal.app.365payb.boy.co.jp 1 2025-12-08 2025-12-08 ok
www.app.365payb.boy.co.jp 2 2026-02-24 2026-07-27 nxdomain
odd.boy.co.jp 2 2025-07-15 2026-06-15 ok
service.boy.co.jp 2 2026-03-01 2026-07-12 ok
dev.service.boy.co.jp 2 2026-03-01 2026-07-12 ok
dev.message.boy.co.jp 1 2025-12-05 2025-12-05 ok
dev-hojin-screening.boy.co.jp 3 2026-08-03 2026-08-20 nodata
*.dev-hojin-screening.boy.co.jp 2 2026-08-20 2026-08-20 —
search.boy.co.jp 3 2026-04-30 2026-09-30 ok
omni.boy.co.jp 5 2026-02-25 2026-07-14 ok
test-omni.boy.co.jp 4 2026-02-25 2026-07-14 ok
dev.cs-api.boy.co.jp 1 2025-12-05 2025-12-05 ok
bank.boy.co.jp 1 2026-01-03 2026-01-03 ok
*.bank.boy.co.jp 1 2026-01-03 2026-01-03 —
personal.boy.co.jp 2 2026-02-06 2026-02-06 ok
mypage.housing-loan.boy.co.jp 2 2026-02-05 2026-02-14 ok
train.mypage.housing-loan.boy.co.jp 2 2026-02-05 2026-02-14 ok
dev.mypage.housing-loan.boy.co.jp 2 2025-11-30 2025-12-01 ok
portalsite.housing-loan.boy.co.jp 2 2026-02-05 2026-02-14 ok
train.portalsite.housing-loan.boy.co.jp 2 2026-02-05 2026-02-14 ok
dev.portalsite.housing-loan.boy.co.jp 2 2025-11-30 2025-12-01 ok
redesign.boy.co.jp 5 2026-05-23 2026-09-20 ok
lifeplansimulation.boy.co.jp 2 2026-02-22 2026-07-10 ok
api.lifeplansimulation.boy.co.jp 2 2026-02-22 2026-07-10 ok
cs-reception.boy.co.jp 2 2026-03-11 2026-07-19 ok
dev.cs-reception.boy.co.jp 3 2025-12-05 2026-07-17 ok
info.boy.co.jp 1 2026-02-25 2026-02-25 ok
bizinfo.boy.co.jp 12 2026-04-27 2026-09-10 ok
gcp.boy.co.jp 3 2026-05-19 2026-09-05 ok
pgcp.boy.co.jp 3 2026-05-23 2026-09-07 ok
tgcp.boy.co.jp 6 2026-04-23 2026-10-02 ok
faq.boy.co.jp 2 2026-03-04 2026-07-20 ok
dev.cs-ds.boy.co.jp 1 2025-12-05 2025-12-05 ok
form.sms.boy.co.jp 1 2026-04-21 2026-04-21 ok
admin.sms.boy.co.jp 1 2026-04-21 2026-04-21 ok
itasset.boy.co.jp 4 2025-08-19 2026-09-08 ok
foreign-deposit.boy.co.jp 3 2025-09-05 2026-09-02 ok
personal-test.boy.co.jp 1 2026-04-13 2026-04-13 ok
kaihatsu.boy.co.jp 6 2026-02-25 2026-08-18 ok
www.boy.co.jp 4 2026-02-25 2026-07-14 ok
hamapay.boy.co.jp 2 2026-04-07 2026-10-07 ok
biz.boy.co.jp 10 2026-04-28 2026-09-25 ok

Programmatic access, with DNS A records: API GET /v1/hosts/boy.co.jp (API key for paging).

Shown here: hostnames with a certificate that is valid now or expired within the last 90 days. The full history since 2013 — hostnames whose last certificate expired earlier — is a Pro plan method: GET /v1/hosts-history/boy.co.jp.