AT&T has topped Vertical Systems Group’s Mid-Year 2019 Global Provider Ethernet LEADERBOARD. Results are as follows (in rank order based on retail port share): AT&T (U.S.), Colt (U.K.), CenturyLink (U.S.), BT Global Services (U.K.), Orange Business Services (France), Verizon (U.S.) and NTT (Japan).

Mid-Year 2019 Global Provider Highlights:
- AT&T retains the top position on the Global Provider LEADERBOARD for the second consecutive year.
- Share margins are tightening among the top four LEADERBOARD ranked companies – AT&T, Colt, CenturyLink and BT Global Services.
- Eight companies attained a Challenge Tier citation, up from seven at the end of 2018, as Global Cloud Xchange advances from the Market Player tier.
- Four of the seven LEADERBOARD providers and six of the eight Challenge Tier providers have MEF CE 2.0 certification.