.how SLA Compliance

TLD SLA Compliance Metrics

Spec 10

DNS

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	38ms	108ms	330
7d	100%	100%	37ms	110ms	1800
30d	100%	100%	40ms	302ms	9970

RDAP

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	64ms	146ms	40
7d	100%	100%	68ms	114ms	240
30d	99.78%	99.33%	73ms	287ms	1340

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%	57ms	58ms	44
7d	100%	56ms	57ms	240
30d	100%	58ms	59ms	1336

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	11ms	12 minutes ago	local	—	OK
`DNS`	v6	11ms	57 days, 6 hours ago	local	—	OK
`DNSSEC`	v4	57ms	1 hour, 1 minute ago	local	Key: 58609	OK
`DNSSEC`	v6	56ms	1 hour, 1 minute ago	local	Key: 58609	OK
`RDAP`	v4	62ms	5 minutes ago	local	TLS 1.3	OK
`RDAP`	v6	67ms	5 minutes ago	local	TLS 1.3	OK

RDAP HTTPS Timing

67ms total

DNS Lookup

—

TCP Connect

10ms

TLS Handshake

16ms

Time to First Byte

66ms

TLS 1.3 / TLS_AES_128_GCM_SHA256

Nameservers

5 IPs tested

Hostname	IP Address	AF	ASN
`ns-tld1.charlestonroadregistry.com`	`216.239.32.105`	v4	AS15169
`ns-tld2.charlestonroadregistry.com`	`216.239.34.105`	v4	AS15169
`ns-tld3.charlestonroadregistry.com`	`216.239.36.105`	v4	AS15169
`ns-tld4.charlestonroadregistry.com`	`216.239.38.105`	v4	AS15169
`ns-tld5.charlestonroadregistry.com`	`216.239.60.105`	v4	AS43515

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