.book

TLD SLA Compliance Monitoring

TLD SLA Compliance Metrics

Spec 10

DNS

Period Availability RTT Compliance RTT p50 RTT p95 Checks TSLAC
24h 100% 100% 36ms 86ms 336
7d 91.60% 91.60% 33ms 86ms 1888
30d 98.36% 98.36% 31ms 102ms 10696

RDAP

Period Availability RTT Compliance RTT p50 RTT p95 Checks TSLAC
24h 100% 100% 315ms 492ms 48
7d 94.23% 94.23% 298ms 512ms 208
30d 99.01% 99.01% 305ms 610ms 1312

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% 102ms 103ms 40
7d 92.67% 95ms 534ms 232
30d 98.65% 74ms 195ms 1332

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 2.1ms 40 minutes ago local NSID: u-ci-nominet2.uschi1. OK
DNS v6 1.7ms 205 days, 12 hours ago local NSID: u-ci-nominet1.uschi1. OK
DNSSEC v4 104ms 1 hour, 8 minutes ago local Key: 44297 OK
DNSSEC v6 102ms 1 hour, 8 minutes ago local Key: 44297 OK
RDAP v4 273ms 2 hours, 4 minutes ago local TLS 1.3 OK
RDAP v6 296ms 2 hours, 3 minutes ago local TLS 1.3 OK

RDAP HTTPS Timing

296ms total
DNS Lookup
0.28ms
TCP Connect
86ms
TLS Handshake
110ms
Time to First Byte
296ms

TLS 1.3 / TLS_AES_128_GCM_SHA256

Nameservers

8 IPs tested
Hostname IP Address AF ASN RPKI Status
dns1.nic.book 213.248.218.61 v4 — —
dns2.nic.book 103.49.82.61 v4 — —
dns3.nic.book 213.248.222.61 v4 — —
dns4.nic.book 43.230.50.61 v4 — —
dnsa.nic.book 156.154.100.3 v4 AS12008
dnsb.nic.book 156.154.101.3 v4 AS12008
dnsc.nic.book 156.154.102.3 v4 AS12008
dnsd.nic.book 156.154.103.3 v4 AS12008

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

Test With Your Computer

DNS

dig @dns1.nic.book book. SOA +dnssec +nsid Query SOA with DNSSEC validation and NSID
drill -D book. SOA @dns1.nic.book Alternative using drill with DNSSEC trace

RDAP

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

Registry Information

Active
TLD .book
Operator Amazon Registry Services, Inc.
RDAP Server https://rdap.nominet.uk/book/ 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 .book compliance metrics programmatically via our REST API.

Quick Start

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

Example Response

{
  "tld": "book",
  "display_name": ".book",
  "operator": "Amazon Registry Services, 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://rdap.nominet.uk/book/"
  },
  "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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