.how

TLD SLA Compliance Monitoring

TLD SLA Compliance Metrics

Spec 10

DNS

Period Availability RTT Compliance RTT p50 RTT p95 Checks TSLAC
24h 100% 100% 38ms 134ms 40
7d 100% 100% 37ms 177ms 1720
30d 94.29% 94.29% 37ms 177ms 2340

RDAP

Period Availability RTT Compliance RTT p50 RTT p95 Checks TSLAC
24h 100% 100% 52ms 94ms 12
7d 100% 100% 53ms 196ms 160
30d 100% 100% 56ms 208ms 216

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% 57ms 57ms 10
7d 99.54% 56ms 57ms 218
30d 99.66% 56ms 57ms 295

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 11ms 4 hours, 46 minutes ago local — OK
DNS v6 12ms 4 hours, 46 minutes ago local — OK
DNSSEC v4 58ms 3 hours, 18 minutes ago local Key: 58609 OK
DNSSEC v6 57ms 3 hours, 18 minutes ago local Key: 58609 OK
RDAP v4 46ms 2 hours, 14 minutes ago local TLS 1.3 OK
RDAP v6 41ms 2 hours, 14 minutes ago local TLS 1.3 OK

RDAP HTTPS Timing

41ms total
DNS Lookup
—
TCP Connect
1.0ms
TLS Handshake
7.0ms
Time to First Byte
41ms

TLS 1.3 / TLS_AES_128_GCM_SHA256

Nameservers

10 IPs tested
Hostname IP Address AF Status
ns-tld1.charlestonroadregistry.com 216.239.32.105 v4
ns-tld1.charlestonroadregistry.com 2001:4860:4802:32::69 v6
ns-tld2.charlestonroadregistry.com 216.239.34.105 v4
ns-tld2.charlestonroadregistry.com 2001:4860:4802:34::69 v6
ns-tld3.charlestonroadregistry.com 216.239.36.105 v4
ns-tld3.charlestonroadregistry.com 2001:4860:4802:36::69 v6
ns-tld4.charlestonroadregistry.com 216.239.38.105 v4
ns-tld4.charlestonroadregistry.com 2001:4860:4802:38::69 v6
ns-tld5.charlestonroadregistry.com 216.239.60.105 v4
ns-tld5.charlestonroadregistry.com 2001:4860:4805::69 v6

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

Test With Your Computer

DNS

dig @ns-tld1.charlestonroadregistry.com how. SOA +dnssec +nsid Query SOA with DNSSEC validation and NSID
drill -D how. SOA @ns-tld1.charlestonroadregistry.com Alternative using drill with DNSSEC trace

RDAP

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

Registry Information

Active
TLD .how
Operator Charleston Road Registry Inc.
RDAP Server https://pubapi.registry.google/rdap/ 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 .how compliance metrics programmatically via our REST API.

Quick Start

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

Example Response

{
  "tld": "how",
  "display_name": ".how",
  "operator": "Charleston Road Registry Inc.",
  "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://pubapi.registry.google/rdap/"
  },
  "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

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