Home ASN LookupAS18933

AS18933 USCC-MPLS01 - T-Mobile USA, Inc.

🇺🇸

ARINassigned

Announced Prefixes (BGP)

14total

14 IPv40 IPv6

IPv4 Addresses

Allocated (RIR)65,536

Announced (BGP)93,184

IPv6 Addresses

Allocated (RIR)0

Announced (BGP)0

Prefix Limit (IPv4)

100

Prefix Limit (IPv6)

Country

🇺🇸 US

RIR

ARIN

Status

assigned

Allocated

2007-04-17

Announced Prefixes

(BGP)14

Prefix	RPKI	IRR	Last Seen
165.27.240.0/22	No ROA	-	2026-10-10
165.27.248.0/24	No ROA	-	2026-10-10
165.27.253.0/24	No ROA	-	2026-10-10
166.181.160.0/20	No ROA	-	2026-10-10
166.182.0.0/16	No ROA	-	2026-10-10
166.182.160.0/20	No ROA	-	2026-10-10
166.224.192.0/19	No ROA	-	2026-10-10
166.224.224.0/19	No ROA	-	2026-10-10
198.227.57.0/24	No ROA	-	2026-10-10
198.227.60.0/24	No ROA	-	2026-10-10

1-10 of 14

1 / 2

Allocated Prefixes

(RIR)1

Prefix	Country	RIR	Status
166.182.0.0/16	🇺🇸 US	ARIN	allocated

All 14 announced prefixes of AS18933 →

BGP Neighbours

(seen in AS paths)

Upstreams (1)

Networks AS18933 hands its own prefixes to: transit providers, or peers at an exchange.

AS6614T Mobile USA14

Transfer History

Registry transfers of AS18933 between organisations.

AS18933M&A · 2025-09-11
UNITED STATES CELLULAR TELEPHONE COMPANY (GREATER KNOXVILLE), L.P.
🇺🇸 US ARIN
→
T-Mobile USA, Inc.
🇺🇸 US ARIN

Date	Resource	From	To	Type
2025-09-11	AS18933	UNITED STATES CELLULAR TELEPHONE COMPANY (GREATER KNOXVILLE), L.P. 🇺🇸 US ARIN	T-Mobile USA, Inc. 🇺🇸 US ARIN	M&A

ASPA

No ASPA

External Links

ARIN Whois RIPEstat

Learn more

What is an ASN?Autonomous systems, ASN ranges and how they are assigned
RPKI and route origin validationWhat the RPKI badges on the prefix list mean
ASPA explainedWhy AS18933 should publish an ASPA object
IPv4 transfers in the ARIN regionMonthly volume and the latest registry transfers
ASN data in AI agents and SIEMMCP server and API integrations

API

Open

GEThttps://api.ipctl.io/v1/asn/18933

Returns ASN details, announced prefixes, and BGP routing data.

curl -s "https://api.ipctl.io/v1/asn/18933" | jq