.amex SLA Compliance

TLD SLA Compliance Metrics

Spec 10

DNS

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	8.0ms	207ms	504
7d	100%	100%	7.0ms	28ms	2880
30d	100%	100%	7.0ms	531ms	16032

RDAP

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	72.73%	100%	84ms	98ms	88
7d	75.00%	100%	87ms	100ms	480
30d	75.30%	100%	86ms	101ms	2640

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%	33ms	41ms	88
7d	100%	32ms	35ms	480
30d	99.96%	32ms	34ms	2660

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	4 minutes ago	local	NSID: Auth_Host2.Toronto_Node1	OK
`DNS`	v6	11ms	56 days, 18 hours ago	local	NSID: Auth_Host3.Toronto_Node1	OK
`DNSSEC`	v4	31ms	19 minutes ago	local	Key: 33586	OK
`DNSSEC`	v6	29ms	19 minutes ago	local	Key: 33586	OK
`RDAP`	v4	91ms	25 minutes ago	local	TLS 1.2	OK
`RDAP`	v6	84ms	25 minutes ago	local	TLS 1.2	OK

RDAP HTTPS Timing

84ms total

DNS Lookup

—

TCP Connect

19ms

TLS Handshake

41ms

Time to First Byte

83ms

TLS 1.2 / TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256

Nameservers

6 IPs tested

Hostname	IP Address	AF	ASN
`a.nic.amex`	`37.209.192.9`	v4	AS12008
`b.nic.amex`	`37.209.194.9`	v4	AS12008
`c.nic.amex`	`37.209.196.9`	v4	AS12008
`ns1.dns.nic.amex`	`156.154.144.10`	v4	AS12008
`ns2.dns.nic.amex`	`156.154.145.10`	v4	AS12008
`ns3.dns.nic.amex`	`156.154.159.10`	v4	AS12008

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

Test With Your Computer

DNS

dig @a.nic.amex amex. SOA +dnssec +nsid Query SOA with DNSSEC validation and NSID

drill -D amex. SOA @a.nic.amex Alternative using drill with DNSSEC trace

RDAP

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

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

Open in Browser View RDAP response directly

Registry Information

Active

TLD .amex

Operator American Express Travel Related Services Company, Inc.

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

Quick Start

GET /any53/api/v1/compliance/amex/

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

Example Response

{
  "tld": "amex",
  "display_name": ".amex",
  "operator": "American Express Travel Related Services Company, 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.nic.amex/"
  },
  "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