.ntt SLA Compliance

TLD SLA Compliance Metrics

Spec 10

DNS

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	128ms	146ms	56
7d	100%	100%	124ms	188ms	1560
30d	94.05%	94.05%	126ms	188ms	2082

RDAP

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	415ms	445ms	4
7d	100%	100%	425ms	446ms	180
30d	100%	100%	426ms	497ms	260

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%	151ms	156ms	6
7d	100%	153ms	159ms	152
30d	100%	153ms	159ms	209

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	122ms	6 minutes ago	local	NSID: app10.nrt1.hosts.meta.r…	OK
`DNS`	v6	137ms	6 minutes ago	local	NSID: app23.nrt1.hosts.meta.r…	OK
`DNSSEC`	v4	155ms	7 hours, 1 minute ago	local	Key: 25342	OK
`DNSSEC`	v6	152ms	7 hours, 1 minute ago	local	Key: 25342	OK
`RDAP`	v4	445ms	9 hours, 52 minutes ago	local	TLS 1.3	OK
`RDAP`	v6	414ms	9 hours, 52 minutes ago	local	TLS 1.3	OK

RDAP HTTPS Timing

414ms total

DNS Lookup

—

TCP Connect

135ms

TLS Handshake

138ms

Time to First Byte

413ms

TLS 1.3 / TLS_AES_256_GCM_SHA384

Nameservers

8 IPs tested

Hostname	IP Address	AF
`tld1.nic.ntt`	`103.47.2.2`	v4
`tld1.nic.ntt`	`2001:dda::2`	v6
`tld2.nic.ntt`	`117.104.133.17`	v4
`tld2.nic.ntt`	`2001:218:3001::2`	v6
`tld3.nic.ntt`	`65.22.40.17`	v4
`tld3.nic.ntt`	`2a01:8840:1ba::17`	v6
`tld5.nic.ntt`	`65.22.40.145`	v4
`tld5.nic.ntt`	`2a01:8840:1ba::145`	v6

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

Test With Your Computer

DNS

dig @tld1.nic.ntt ntt. SOA +dnssec +nsid Query SOA with DNSSEC validation and NSID

drill -D ntt. SOA @tld1.nic.ntt Alternative using drill with DNSSEC trace

RDAP

curl -sS "https://rdap.nic.ntt/rdap/domain/nic.ntt" | jq . Fetch RDAP JSON (positive lookup)

curl -I -sS "https://rdap.nic.ntt/rdap/domain/nic.ntt" Headers only (check TLS, timing)

Open in Browser View RDAP response directly

Registry Information

Active

TLD .ntt

Operator NIPPON TELEGRAPH AND TELEPHONE CORPORATION

RDAP Server https://rdap.nic.ntt/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 .ntt compliance metrics programmatically via our REST API.

Quick Start

GET /any53/api/v1/compliance/ntt/

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

Example Response

{
  "tld": "ntt",
  "display_name": ".ntt",
  "operator": "NIPPON TELEGRAPH AND TELEPHONE CORPORATION",
  "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.nic.ntt/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