18
records
IPv6 Addresses
TTL
ces.net. 1200 IN AAAA 2001:718:FF05:202:0:0:0:243
Name Servers
TTL
ces.net. 1200 IN NS decsys.vsb.cz. ces.net. 1200 IN NS nsa.ces.net. ces.net. 1200 IN NS nsa.cesnet.cz.
Mail Servers
TTL
MX
—
10
20m
MX
—
10
20m
ces.net. 1200 IN MX 10 ag2.cesnet.cz. ces.net. 1200 IN MX 10 ag1.cesnet.cz.
SOA Details
TTL
20m
SOA
Responsible
hostmaster.cesnet.cz
SOA
Serial
2019072289
SOA
Times
Refresh
8h
Retry
2h
Expire
14d
Minimum TTL
15m
ces.net. 1200 IN SOA nsa.cesnet.cz. hostmaster.cesnet.cz. 2019072289 28800 7200 1209600 900
Certificate Authority Authorization
TTL
20m
20m
CAA
—
0
issuemail
;
20m
ces.net. 1200 IN CAA 0 issue "harica.gr" ces.net. 1200 IN CAA 0 issue "letsencrypt.org" ces.net. 1200 IN CAA 0 issue "sectigo.com" ces.net. 1200 IN CAA 0 issuemail ";"
DMARC
TTL
DMARC
Policy
Organizational policy (p): how receivers treat mail that fails aligned DMARC checks — none (monitor only), quarantine (often junk), or reject (block).
none
quarantine
reject
20m
DMARC
Percentage
pct: share of mail that gets quarantine/reject; 100 = all failing messages (default).
100
DMARC
RUA
Aggregate DMARC reports (ZIP/XML). Optional but recommended for visibility.
No aggregate report URIs (RUA).
DMARC
RUF
Forensic (per-failure) reports. Often omitted for privacy or volume.
No forensic report URIs (RUF).
ces.net. 1200 IN DMARC v=DMARC1; p=reject
DKIM
TTL
No DKIM TXT with `v=DKIM1` was returned for the selector names we probe automatically.
SPF (Sender Policy Framework)
TTL
SPF
SPFv1
| Qualifier | Mechanism | Target / value | Valid | Details |
|---|---|---|---|---|
| + Pass | include |
|
||
| - Fail | all |
—
|
|
20m
ces.net. 1200 IN TXT "v=spf1 include:cesnet.cz -all"
MTA-STS
TTL
This hostname does not publish an MTA-STS policy (no v=STSv1 TXT at _mta-sts.<name> and/or no policy at https://mta-sts.<name>/.well-known/mta-sts.txt).
DNSSEC Public Keys
TTL
DNSKEY
256 3 10 AwEAAbkdhJjZ7FRVh5lG+hnCWywoJKxq1P1yp0nb++kAyspBPTsN2/oy9/7VSnUGn8rUq1iboH46SEua/aLEP6J+mgV8qGHKWfHIRl0XoofbNKblCVnKI7ooBKitwG7kY0jtxg+vQouESOWXYpwq0yprCyAuPZcx0ssGDYwuaISQgI+kfW0qIXHXXixfIp6Y3D5mhCYPFgMylo6bs+fifFvneRYPMWqVcZb32g6YTCn/nRgsdBjj49yiTqA6MM1bIk+lsbhsHGBB2wpbaywKPCMFyDgzQChPstKGf/L0GjxlF7+tViZkyAPjbaVBN5/gIDhrYaMYaebH6OjWre1RbHKWbe8=
20m
DNSKEY
257 3 10 AwEAAd041ZGgoCfzv3s9rZf60xg69vHu/vOApggKxEk8KMq4nQOGPxBICM3q+XrgLEn8gqbtVCaQaiKVRF5epmpMvbXLlw4hnr3wlwwXVI6GUrqydnojIJiX0MGiITgZ1eRDP9l+ZTnjusDddLhiRxIzbYXx0GUepSxyIAOKfnE40sZUtPUX7cGZaFvaJgHPiSS5iWgcMWNgV8NOFanRRwG5aC4fPX8GOEgT0jJtu9xiuJNU/1t8HHoiUii/2HdsWMadmr8Ghet8uA8FRjlez5+TgpsAXbNe/rgyI4XtQ926hq9IC3a7z40T1V/YasjFKA1PjMQIWCBpYurPlFweZ8XpUGk=
20m
ces.net. 1200 IN DNSKEY 256 3 10 AwEAAbkdhJjZ7FRVh5lG+hnCWywoJKxq1P1yp0nb++kAyspBPTsN2/oy9/7VSnUGn8rUq1iboH46SEua/aLEP6J+mgV8qGHKWfHIRl0XoofbNKblCVnKI7ooBKitwG7kY0jtxg+vQouESOWXYpwq0yprCyAuPZcx0ssGDYwuaISQgI+kfW0qIXHXXixfIp6Y3D5mhCYPFgMylo6bs+fifFvneRYPMWqVcZb32g6YTCn/nRgsdBjj49yiTqA6MM1bIk+lsbhsHGBB2wpbaywKPCMFyDgzQChPstKGf/L0GjxlF7+tViZkyAPjbaVBN5/gIDhrYaMYaebH6OjWre1RbHKWbe8= ces.net. 1200 IN DNSKEY 257 3 10 AwEAAd041ZGgoCfzv3s9rZf60xg69vHu/vOApggKxEk8KMq4nQOGPxBICM3q+XrgLEn8gqbtVCaQaiKVRF5epmpMvbXLlw4hnr3wlwwXVI6GUrqydnojIJiX0MGiITgZ1eRDP9l+ZTnjusDddLhiRxIzbYXx0GUepSxyIAOKfnE40sZUtPUX7cGZaFvaJgHPiSS5iWgcMWNgV8NOFanRRwG5aC4fPX8GOEgT0jJtu9xiuJNU/1t8HHoiUii/2HdsWMadmr8Ghet8uA8FRjlez5+TgpsAXbNe/rgyI4XtQ926hq9IC3a7z40T1V/YasjFKA1PjMQIWCBpYurPlFweZ8XpUGk=
Delegation Signer
TTL
DS
27793 10 1 36066B8D354DE4A3EF510B6F9F53E5FFF00DAAE1
20m
DS
27793 10 2 8BA57858EC53F7C461BAD1917B560B7699E344F1DAC5168734A8C4D49B001EC2
20m
ces.net. 1200 IN DS 27793 10 1 36066B8D354DE4A3EF510B6F9F53E5FFF00DAAE1 ces.net. 1200 IN DS 27793 10 2 8BA57858EC53F7C461BAD1917B560B7699E344F1DAC5168734A8C4D49B001EC2