.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% 39ms 92ms 672
7d 100% 100% 31ms 128ms 3840
30d 99.92% 99.92% 30ms 232ms 21320

RDAP

Period Availability RTT Compliance RTT p50 RTT p95 Checks TSLAC
24h 100% 100% 298ms 462ms 80
7d 100% 100% 299ms 485ms 480
30d 100% 99.93% 307ms 533ms 2684

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% 52ms 105ms 66
7d 100% 37ms 105ms 360
30d 99.90% 38ms 118ms 2000

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 10 minutes ago local NSID: u-ci-nominet1.cator1. OK
DNS v6 1.7ms 56 days, 22 hours ago local NSID: u-ci-nominet1.uschi1. OK
DNSSEC v4 37ms 15 minutes ago local Key: 44297 OK
DNSSEC v6 101ms 15 minutes ago local Key: 44297 OK
RDAP v4 386ms 9 minutes ago local TLS 1.3 OK
RDAP v6 288ms 9 minutes ago local TLS 1.3 OK

RDAP HTTPS Timing

288ms total
DNS Lookup
—
TCP Connect
85ms
TLS Handshake
100ms
Time to First Byte
287ms

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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