codemirror.net
B
24 hours
100.00%
7 days
100.00%
30 days
100.00%
IPv4 / IPv6
1
1
SSL Certificate
59d
Security Headers
4/6
Status Badges
Click any snippet to copy. Use Markdown for GitHub READMEs, HTML for websites.
| Badge | Markdown | HTML |
|---|---|---|
|
[](https://updown.website/site/codemirror.net/) |
<a href="https://updown.website/site/codemirror.net/"><img src="https://updown.website/badge/codemirror.net/status.svg" alt="Status"></a> |
|
[](https://updown.website/site/codemirror.net/) |
<a href="https://updown.website/site/codemirror.net/"><img src="https://updown.website/badge/codemirror.net/uptime.svg" alt="Uptime"></a> |
|
[](https://updown.website/site/codemirror.net/) |
<a href="https://updown.website/site/codemirror.net/"><img src="https://updown.website/badge/codemirror.net/response-time.svg" alt="Response Time"></a> |
|
[](https://updown.website/site/codemirror.net/) |
<a href="https://updown.website/site/codemirror.net/"><img src="https://updown.website/badge/codemirror.net/ssl.svg" alt="SSL"></a> |
|
[](https://updown.website/site/codemirror.net/) |
<a href="https://updown.website/site/codemirror.net/"><img src="https://updown.website/badge/codemirror.net/cwv.svg" alt="Performance"></a> |
|
[](https://updown.website/site/codemirror.net/) |
<a href="https://updown.website/site/codemirror.net/"><img src="https://updown.website/badge/codemirror.net/cwv.svg?category=accessibility" alt="Accessibility"></a> |
|
[](https://updown.website/site/codemirror.net/) |
<a href="https://updown.website/site/codemirror.net/"><img src="https://updown.website/badge/codemirror.net/cwv.svg?category=seo" alt="SEO"></a> |
|
[](https://updown.website/site/codemirror.net/) |
<a href="https://updown.website/site/codemirror.net/"><img src="https://updown.website/badge/codemirror.net/security-headers.svg" alt="Security Headers"></a> |
|
[](https://updown.website/site/codemirror.net/) |
<a href="https://updown.website/site/codemirror.net/"><img src="https://updown.website/badge/codemirror.net/uptime.svg?period=24h" alt="Uptime 24h"></a> |
|
[](https://updown.website/site/codemirror.net/) |
<a href="https://updown.website/site/codemirror.net/"><img src="https://updown.website/badge/codemirror.net/incidents.svg" alt="Incidents"></a> |
|
[](https://updown.website/site/codemirror.net/) |
<a href="https://updown.website/site/codemirror.net/"><img src="https://updown.website/badge/codemirror.net/ipv46.svg" alt="IPv4/IPv6"></a> |
Site Health (24 h)
HTTP Response
DNS Lookup
Ping
Up
Down
Reports
Incident
Monitoring
Recent HTTP Checks (24 h)
Total Checks
9
Success Rate
100%
Avg Response
6828 ms
Min / Max
234
/
12914 ms
Recent Checks
12:07
11:49
| Time | Status | Code | Response | Agent | Error |
|---|---|---|---|---|---|
| 11:49:35 | UP | 200 | 4813 ms | prod-local | — |
| 09:11:30 | UP | 200 | 7771 ms | prod-local | — |
| 06:46:52 | UP | 200 | 9359 ms | prod-local | — |
| 04:47:53 | UP | 200 | 12914 ms | prod-local | — |
| 01:51:23 | UP | 200 | 4004 ms | prod-local | — |
| 00:47:22 | UP | 200 | 5166 ms | prod-local | — |
| 17:54:15 | UP | 200 | 8729 ms | prod-local | — |
| 16:44:53 | UP | 200 | 8458 ms | prod-local | — |
| 12:07:49 | UP | 200 | 234 ms | prod-local | — |
Incident History
No incidents recorded — all clear!
Mail Server (SMTP) Checks
3 checked
| Status | MX Host | Port | IP | EHLO | STARTTLS | TLS Works | TLS Ver | Open Relay | Auth | Reverse DNS | Banner | Latency | Checked |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
mail.marijnhaverbeke.nl |
25 |
149.210.142.219 |
— | — | — | — | — | 10002.9 ms | 1 day, 12 hours ago | ||||
mail.marijnhaverbeke.nl |
465 |
149.210.142.219 |
— | — | — | — | — | 10009.5 ms | 1 day, 12 hours ago | ||||
mail.marijnhaverbeke.nl |
587 |
149.210.142.219 |
— | — | — | — | — | 10009.2 ms | 1 day, 12 hours ago |
Service Checks (Banner Grab)
0 up
3 down
No service checks yet. The agent will banner-grab discovered open ports on the next deep cycle.
Security
SSL / TLS Certificate
59
days left
Valid
Mar 23, 2026
Jun 21, 2026
Issued → Expires
| Subject | commonName=codemirror.net |
|---|---|
| Issuer | countryName=US, organizationName=Let's Encrypt, commonName=R12 |
| Valid From | 2026-03-23 02:26 |
| Expires | 2026-06-21 02:26 |
| Serial Number | 053043BDBFC7DE3C4737DFD20BA2AE2A4388 |
| SHA-256 Fingerprint | f7:b4:dc:cd:a5:4a:83:f9:35:72:3c:39:69:57:ee:bd:39:16:ad:53:85:59:1b:6b:e2:cd:89:53:17:80:3d:63 |
| Subject Alt Names | codemirror.net discuss.codemirror.net lezer.codemirror.net |
| Last Checked | 2026-04-22 11:49:35 |
Latest HTTP Response Details
| Final URL | https://codemirror.net/ |
|---|---|
| Status Code | 200 |
| Response Time | 4813 ms |
| Content Size | 13 KB (12.6 KB) |
| Content Type | text/html; charset=utf-8 |
| Server | nginx/1.26.3 |
| TLS Version | TLSv1.3 |
|---|---|
| TLS Cipher | TLS_AES_256_GCM_SHA384 |
| Redirects | 0 |
| Checked | 2026-04-22 11:49:35 |
Security Headers
4/6
| Header | Status | Value |
|---|---|---|
Strict-Transport-Security |
Missing | — |
Content-Security-Policy |
Present | upgrade-insecure-requests; base-uri 'self'; object-src 'none'; script-src 'nonce-kwB579mzJ1EruGa4Umz94IDH8' 'strict-dynamic'; frame-ancestors 'self'; manifest-src 'self' |
X-Frame-Options |
Present | SAMEORIGIN |
X-Content-Type-Options |
Present | nosniff |
Referrer-Policy |
Present | strict-origin-when-cross-origin |
Permissions-Policy |
Missing | — |
Email Security Posture
MX Records
SPF
Details
v=spf1 mx include:mail.marijnhaverbeke.nl ?all
DMARC
Details
v=DMARC1; p=none
BIMI
MTA-STS
Strong
Overall
DNS & Network
DNS Intelligence (24h)
Avg Resolution
82.8 ms
Min / Max
1.0
/
190.0 ms
Record Types
7
Lookups (24h)
72
DNS Records
A
149.210.142.219
86400s
166.8ms
AAAA
2a01:7c8:aab0:26e:5054:ff:fe3a:8388
86400s
160.1ms
MX
| 50 | mail.marijnhaverbeke.nl |
86400s
86.1ms
NS
ns0.transip.net
ns1.transip.nl
ns2.transip.eu
86400s
81.9ms
TXT
SPF
(1)
v=spf1 mx include:mail.marijnhaverbeke.nl ?all
DMARC
(1)
v=DMARC1; p=none
86400s
177.6ms
SOA
Primary NS
ns0.transip.net
Admin
hostmaster@transip.nl
Serial: 2024053001
Refresh: 1d
Retry: 30m
Expire: 28d
Min TTL: 5m
3600s
81.0ms
PTR
mail.marijnhaverbeke.nl
86400s
290.6ms
DNS Propagation Consistent
| Resolver | IPs Returned | Response Time | Status |
|---|---|---|---|
| Quad9 |
149.210.142.219
|
155.37ms | |
149.210.142.219
|
7.35ms | ||
| AdGuard |
149.210.142.219
|
243.95ms | |
| OpenDNS |
149.210.142.219
|
249.03ms | |
| Cloudflare |
149.210.142.219
|
22.58ms |
WHOIS / Domain Registration
Registrar
Key-Systems GmbH
Registrant Organization
REDACTED FOR PRIVACY
Created
2010-08-03
Updated
2025-12-02
Expires
2026-08-03
Name Servers (WHOIS)
ns0.transip.net
ns1.transip.nl
ns2.transip.eu
Domain Status
clientTransferProhibited
DNSSEC
Enabled
Country
DE
WHOIS Last Checked
2026-04-20 22:42
Resolution Time (A/AAAA recent)
01:51
11:49
| Time | Type | Values | TTL | Resolution | Nameserver |
|---|---|---|---|---|---|
| 11:49:35 | PTR |
2a01:7c8:aab0:26e:5054:ff:fe3a:8388
|
86400s | 290.6 ms | — |
| 11:49:35 | PTR |
149.210.142.219
|
86400s | 236.9 ms | — |
| 11:49:35 | SOA |
ns0.transip.net hostmaster.transip.nl 2024053001 86400 1800 2419200 300
|
3600s | 81.0 ms | 10.89.0.1 |
| 11:49:35 | TXT |
v=DMARC1; p=none
v=spf1 mx include:mail.marijnhaverbeke.nl ?all
|
86400s | 177.6 ms | 10.89.0.1 |
| 11:49:35 | NS |
ns0.transip.net
ns1.transip.nl
ns2.transip.eu
|
86400s | 81.9 ms | 10.89.0.1 |
| 11:49:35 | MX |
50 mail.marijnhaverbeke.nl
|
86400s | 86.1 ms | 10.89.0.1 |
| 11:49:35 | AAAA |
2a01:7c8:aab0:26e:5054:ff:fe3a:8388
|
86400s | 160.1 ms | 10.89.0.1 |
| 11:49:35 | A |
149.210.142.219
|
86400s | 166.8 ms | 10.89.0.1 |
| 09:11:29 | PTR |
2a01:7c8:aab0:26e:5054:ff:fe3a:8388
|
86400s | 198.5 ms | — |
| 09:11:29 | PTR |
149.210.142.219
|
86400s | 173.2 ms | — |
| 09:11:29 | SOA |
ns0.transip.net hostmaster.transip.nl 2024053001 86400 1800 2419200 300
|
3600s | 81.6 ms | 10.89.0.1 |
| 09:11:29 | TXT |
v=DMARC1; p=none
v=spf1 mx include:mail.marijnhaverbeke.nl ?all
|
86400s | 168.1 ms | 10.89.0.1 |
| 09:11:29 | NS |
ns0.transip.net
ns1.transip.nl
ns2.transip.eu
|
86400s | 89.1 ms | 10.89.0.1 |
| 09:11:29 | MX |
50 mail.marijnhaverbeke.nl
|
86400s | 170.1 ms | 10.89.0.1 |
| 09:11:29 | AAAA |
2a01:7c8:aab0:26e:5054:ff:fe3a:8388
|
86400s | 158.4 ms | 10.89.0.1 |
| 09:11:29 | A |
149.210.142.219
|
86400s | 162.2 ms | 10.89.0.1 |
| 06:46:52 | PTR |
2a01:7c8:aab0:26e:5054:ff:fe3a:8388
|
63s | 4.6 ms | — |
| 06:46:52 | PTR |
149.210.142.219
|
63s | 1.3 ms | — |
| 06:46:52 | SOA |
ns0.transip.net hostmaster.transip.nl 2024053001 86400 1800 2419200 300
|
3600s | 167.6 ms | 10.89.0.1 |
| 06:46:52 | TXT |
v=DMARC1; p=none
v=spf1 mx include:mail.marijnhaverbeke.nl ?all
|
63s | 1.1 ms | 10.89.0.1 |
| 06:46:52 | NS |
ns1.transip.nl
ns2.transip.eu
ns0.transip.net
|
63s | 2.9 ms | 10.89.0.1 |
| 06:46:52 | MX |
50 mail.marijnhaverbeke.nl
|
63s | 10.4 ms | 10.89.0.1 |
| 06:46:52 | AAAA |
2a01:7c8:aab0:26e:5054:ff:fe3a:8388
|
63s | 2.0 ms | 10.89.0.1 |
| 06:46:52 | A |
149.210.142.219
|
63s | 1.4 ms | 10.89.0.1 |
| 04:47:52 | PTR |
2a01:7c8:aab0:26e:5054:ff:fe3a:8388
|
86400s | 263.7 ms | — |
| 04:47:52 | PTR |
149.210.142.219
|
86400s | 262.6 ms | — |
| 04:47:52 | SOA |
ns0.transip.net hostmaster.transip.nl 2024053001 86400 1800 2419200 300
|
3600s | 156.5 ms | 10.89.0.1 |
| 04:47:52 | TXT |
v=DMARC1; p=none
v=spf1 mx include:mail.marijnhaverbeke.nl ?all
|
86400s | 83.2 ms | 10.89.0.1 |
| 04:47:52 | NS |
ns0.transip.net
ns1.transip.nl
ns2.transip.eu
|
86400s | 84.2 ms | 10.89.0.1 |
| 04:47:52 | MX |
50 mail.marijnhaverbeke.nl
|
86400s | 174.3 ms | 10.89.0.1 |
| 04:47:52 | AAAA |
2a01:7c8:aab0:26e:5054:ff:fe3a:8388
|
86400s | 79.7 ms | 10.89.0.1 |
| 04:47:52 | A |
149.210.142.219
|
86400s | 161.3 ms | 10.89.0.1 |
| 01:51:22 | PTR |
2a01:7c8:aab0:26e:5054:ff:fe3a:8388
|
21600s | 133.8 ms | — |
| 01:51:22 | PTR |
149.210.142.219
|
57s | 14.2 ms | — |
| 01:51:22 | SOA |
ns0.transip.net hostmaster.transip.nl 2024053001 86400 1800 2419200 300
|
3600s | 196.4 ms | 10.89.0.1 |
| 01:51:22 | TXT |
v=spf1 mx include:mail.marijnhaverbeke.nl ?all
v=DMARC1; p=none
|
4419s | 13.6 ms | 10.89.0.1 |
| 01:51:22 | NS |
ns0.transip.net
ns2.transip.eu
ns1.transip.nl
|
17743s | 13.8 ms | 10.89.0.1 |
| 01:51:22 | MX |
50 mail.marijnhaverbeke.nl
|
21600s | 180.5 ms | 10.89.0.1 |
| 01:51:22 | AAAA |
2a01:7c8:aab0:26e:5054:ff:fe3a:8388
|
1169s | 14.1 ms | 10.89.0.1 |
| 01:51:22 | A |
149.210.142.219
|
3266s | 8.0 ms | 10.89.0.1 |
| 00:47:22 | PTR |
2a01:7c8:aab0:26e:5054:ff:fe3a:8388
|
21600s | 179.1 ms | — |
| 00:47:22 | PTR |
149.210.142.219
|
3914s | 13.7 ms | — |
| 00:47:22 | SOA |
ns0.transip.net hostmaster.transip.nl 2024053001 86400 1800 2419200 300
|
3600s | 181.3 ms | 10.89.0.1 |
| 00:47:22 | TXT |
v=DMARC1; p=none
v=spf1 mx include:mail.marijnhaverbeke.nl ?all
|
21600s | 182.3 ms | 10.89.0.1 |
| 00:47:22 | NS |
ns0.transip.net
ns1.transip.nl
ns2.transip.eu
|
21600s | 182.5 ms | 10.89.0.1 |
| 00:47:22 | MX |
50 mail.marijnhaverbeke.nl
|
21600s | 179.4 ms | 10.89.0.1 |
| 00:47:22 | AAAA |
2a01:7c8:aab0:26e:5054:ff:fe3a:8388
|
11204s | 14.0 ms | 10.89.0.1 |
| 00:47:22 | A |
149.210.142.219
|
6333s | 14.4 ms | 10.89.0.1 |
| 17:54:15 | PTR |
2a01:7c8:aab0:26e:5054:ff:fe3a:8388
|
3036s | 2.0 ms | — |
| 17:54:15 | PTR |
149.210.142.219
|
3036s | 1.6 ms | — |
Open Ports
No open ports detected yet, or scan hasn't completed.
Active IP Addresses
| IP Address | Version | Reverse DNS | CIDR | Country | City | ASN | Reputation | First Seen | Last DNS | Hits | Misses | Uptime % | Avg Latency |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2a01:7c8:aab0:26e:5054:ff:fe3a:8388 |
IPv6 |
mail.marijnhaverbeke.nl
|
2a01:7c8:aab0::/48
|
NL | — | AS20857 Signet B.V. | Clean | 2026-04-19 17:37 | 2026-04-22 11:49 | 9 | 0 | 100.0% | 1025.1 ms |
149.210.142.219 |
IPv4 |
mail.marijnhaverbeke.nl
|
149.210.142.0/24
|
NL | Hendrik-Ido-Ambacht | AS20857 Signet B.V. | Clean | 2026-04-19 17:37 | 2026-04-22 11:49 | 9 | 0 | 100.0% | 1448.6 ms |
Technology
Technology Stack
8 detected
HTTP/2
HTTP/3 (QUIC)
8
Technologies
DNS
1
NS record: ns1.transip.nl
Email
3
DMARC
TXT DMARC policy: v=DMARC1; p=none
DMARC None Policy
DMARC monitoring only: v=DMARC1; p=none
SPF Record
TXT SPF: v=spf1 mx include:mail.marijnhaverbeke.nl ?all
Library
1
CodeMirror editor
Platform
1
Cargo
Server
1
Nginx
v1.26.3
Server header
Social
1
Open Graph meta tags
Technology Provider
1 tech · 1 sites
This domain provides technology used by other monitored sites.
CodeMirror
Discovery
Discovered Sub-domains
1
Link Scan
1
| Subdomain | Source | Status | Code | Response | IPs | Last Checked |
|---|---|---|---|---|---|---|
discuss.codemirror.net |
Link Scan | UP | 200 | 522 ms |
2a01:7c8:aab0:26e:5054:ff:fe3a:8388
|
2 days, 3 hours ago |