.book SLA Compliance

TLD SLA Compliance Metrics

Spec 10

DNS

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	27ms	85ms	336
7d	100%	100%	27ms	87ms	1920
30d	100%	100%	27ms	187ms	5520

RDAP

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	300ms	471ms	48
7d	100%	100%	293ms	506ms	240
30d	99.88%	99.51%	315ms	656ms	816

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
24h	100%	38ms	102ms	40
7d	100%	38ms	103ms	240
30d	99.38%	38ms	222ms	812

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
`DNS`	v4	1.6ms	48 minutes ago	local	NSID: u-ci-nominet1.uschi1.	OK
`DNS`	v6	1.7ms	160 days, 4 hours ago	local	NSID: u-ci-nominet1.uschi1.	OK
`DNSSEC`	v4	38ms	1 hour, 17 minutes ago	local	Key: 44297	OK
`DNSSEC`	v6	103ms	1 hour, 17 minutes ago	local	Key: 44297	OK
`RDAP`	v4	328ms	2 hours, 12 minutes ago	local	TLS 1.3	OK
`RDAP`	v6	270ms	2 hours, 12 minutes ago	local	TLS 1.3	OK

RDAP HTTPS Timing

270ms total

DNS Lookup

0.34ms

TCP Connect

85ms

TLS Handshake

95ms

Time to First Byte

270ms

TLS 1.3 / TLS_AES_128_GCM_SHA256

Nameservers

8 IPs tested

Hostname	IP Address	AF	ASN	RPKI
`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