mail.crest-sch.com - robtex.com

mail.crest-sch.com

CNAMEwww4052.sakura.ne.jp
DNSSEC⚠️ Not signed
A2401:2500:10a:1028:153:127:214:192🇯🇵 SAKURA-A2401:2500::/32 (ISHIKARI) SAKURA Internet // HOKKAIDO BACKBONE 1-8-14 Minami-Honmachi, Chuo-ku, Osaka 541-0054, Japan
PTRwww4052.sakura.ne.jp
A153.127.214.192🇯🇵 SAKURA-A153.127.192.0/19 (ISHIKARI) SAKURA Internet // HOKKAIDO JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan

crest-sch.com

DNSSEC⚠️ Not signed
A153.127.214.192🇯🇵 SAKURA-A153.127.192.0/19 (ISHIKARI) SAKURA Internet // HOKKAIDO JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan
NS01.dnsv.jp ⭐
NS02.dnsv.jp
NS03.dnsv.jp
NS04.dnsv.jp
MXwww4052.sakura.ne.jp ⭐
TXTv=spf1 a:www4052.sakura.ne.jp -all
SOA01.dnsv.jphostmaster@dnsv.jp serial=1625987281

Previously MX for

crest-sch.com

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DNS History

3 records (1 active, 2 former)

20162017201820192020202120222023202420252026A176.34.54.21054.248.127.95CNAMEwww4052.sakura.ne.jp
○A176.34.54.2102015-08-17 → 2016-03-25 · 4 obs
● 2015-08-17 13:12:32
● 2016-03-25 02:15:42
○ 2016-09-15 21:35:20
○ 2026-05-10 02:15:48
○A54.248.127.952016-09-15 → 2016-09-15 · 3 obs
○ 2016-03-25 02:15:42
● 2016-09-15 21:35:20
○ 2026-05-10 02:15:48
●CNAMEwww4052.sakura.ne.jp2026-05-10 → 2026-05-10 · 1 obs
● 2026-05-10 02:15:48

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coml.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...-
crest-sch.com01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp, 04.dnsv.jp-

✅ Authoritative Response

Server:157.7.33.53

NS records: 01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp, 04.dnsv.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for crest-sch.com (unsigned zone)

⏱️ Timing

Total: 943ms | Queries: -

📄 Records

TypeCountSample Data
CNAME1www4052.sakura.ne.jp

Analysis

IP Addresses

mail.crest-sch.com points to two IPs: 2401:2500:10a:1028:153:127:214:192 and 153.127.214.192.

Other host names, for instance okinawa.ccbc.co.jp, sunosaki.com, yamamoto-p.com, crosspeer.jp and nakayamahitoshi.com share IP numbers with mail.crest-sch.com.