.courses

TLD SLA Compliance Monitoring

TLD SLA Compliance Metrics

Spec 10

DNS

Period Availability RTT Compliance RTT p50 RTT p95 Checks TSLAC
24h 100% 100% 3.0ms 15ms 144
7d 100% 100% 3.0ms 64ms 2520
30d 96.13% 96.13% 4.0ms 71ms 3314

RDAP

Period Availability RTT Compliance RTT p50 RTT p95 Checks TSLAC
24h No data available
7d 100% 100% 88ms 104ms 204
30d 93.38% 100% 87ms 105ms 272

DNSSEC Validation Metrics

Registry Agreement Spec 6

DNSSEC is required by the Registry Agreement (Specification 6) but is not part of the Spec 10 SLA. We monitor DNSSEC validation independently.

Period Validation Rate RTT p50 RTT p95 Checks Status
24h 100% 33ms 33ms 10
7d 100% 34ms 39ms 122
30d 98.99% 34ms 114ms 198

Unlike Spec 10 services, DNSSEC has no formal availability SLA. Thresholds shown are operational guidelines.

Current Check Status

Reported by Any53 Probes
Type AF RTT Last Check Source Details Status TSLAC
DNS v4 1.3ms 2 minutes ago local NSID: Auth_Host1.Chicago_Node1 OK
DNS v6 1.4ms 2 minutes ago local NSID: Auth_Host3.Chicago_Node1 OK
DNSSEC v4 33ms 1 hour, 44 minutes ago local Key: 15277 OK
DNSSEC v6 33ms 1 hour, 44 minutes ago local Key: 15277 OK
RDAP v4 81ms 23 hours, 42 minutes ago local TLS 1.2 OK
RDAP v6 88ms 23 hours, 42 minutes ago local TLS 1.2 OK

RDAP HTTPS Timing

88ms total
DNS Lookup
—
TCP Connect
18ms
TLS Handshake
41ms
Time to First Byte
88ms

TLS 1.2 / TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256

Nameservers

12 IPs tested
Hostname IP Address AF Status
a.nic.courses 37.209.192.9 v4
a.nic.courses 2001:dcd:1::9 v6
b.nic.courses 37.209.194.9 v4
b.nic.courses 2001:dcd:2::9 v6
c.nic.courses 37.209.196.9 v4
c.nic.courses 2001:dcd:3::9 v6
x.nic.courses 156.154.172.82 v4
x.nic.courses 2610:a1:1074::1:82 v6
y.nic.courses 156.154.173.82 v4
y.nic.courses 2610:a1:1075::1:82 v6
z.nic.courses 156.154.174.82 v4
z.nic.courses 2610:a1:1076::1:82 v6

Per ICANN Spec 10, we test all delegated nameserver IPs independently.

Test With Your Computer

DNS

dig @a.nic.courses courses. SOA +dnssec +nsid Query SOA with DNSSEC validation and NSID
drill -D courses. SOA @a.nic.courses Alternative using drill with DNSSEC trace

RDAP

curl -sS "https://rdap.nic.courses/domain/nic.courses" | jq . Fetch RDAP JSON (positive lookup)
curl -I -sS "https://rdap.nic.courses/domain/nic.courses" Headers only (check TLS, timing)
Open in Browser View RDAP response directly

Registry Information

Active
TLD .courses
Operator Registry Services, LLC
RDAP Server https://rdap.nic.courses/ RDAP Client

ICANN SLA Requirements

Per ICANN Registry Agreement Specification 10:

DNS SLA UDP RTT ≤ 500ms for 95% of queries. Availability: 99% (max 432 min/month downtime).
RDAP SLA RTT ≤ 4000ms for 95% of queries. Availability: 98% (max 864 min/month downtime).

API Access

JSON API

Access .courses compliance metrics programmatically via our REST API.

Quick Start

GET /any53/api/v1/compliance/courses/ 
curl -H "X-API-Key: ${YOUR_API_KEY}" \
  "https://www.any53.com/any53/api/v1/compliance/courses/"

Example Response

{
  "tld": "courses",
  "display_name": ".courses",
  "operator": "Registry Services, LLC",
  "updated_at": "2026-01-31T12:00:00Z",
  "dns": {
    "availability_24h": 99.99,
    "rtt_p50_ms": 12,
    "rtt_p95_ms": 42,
    "sla_threshold_ms": 500
  },
  "rdds": {
    "protocol": "RDAP",
    "availability_24h": 99.95,
    "rtt_p50_ms": 180,
    "rtt_p95_ms": 412,
    "sla_threshold_ms": 4000
  },
  "servers": {
    "rdap_url": "https://rdap.nic.courses/"
  },
  "spec10_compliant": true
}

Generate API Key

Get a free API key to start making requests. Provide an email to upgrade to the verified tier (600 requests/hour).

Endpoints

Endpoint Description Tier
GET /compliance/ List all monitored TLDs All
GET /compliance/{tld}/ Current metrics for a TLD All
GET /compliance/{tld}/history/ Historical time-series data Organization
GET /compliance/{tld}/probes/ Per-probe breakdown Organization
POST /compliance/keys/ Generate a new API key No auth

Rate Limits

Tier Rate Limit Features
Anonymous 100/hour Current snapshot, hourly aggregates
Verified 600/hour Current snapshot, hourly aggregates
Organization 6000/hour Historical data, per-minute resolution, per-probe breakdown

Enter a TLD name or IDN code • Browse all TLDs